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Hollow Candle
CandleA modern variant of the candlestick chart that modifies the body fill rule: a candle is hollow when the close exceeds the prior close, regardless of the open-close relationship. This reveals trend continuation vs. reversal at a glance.
Origins & History
The hollow candle chart is a relatively modern innovation in financial charting, representing an evolution of the traditional chart that addresses a specific limitation: the standard candlestick’s body fill rule only compares the current open and close, ignoring the relationship to the previous ’s close.
The hollow candle variant was developed and popularized in the early 2000s, primarily through <Em > Thinkorswim</Em > (TD Ameritrade’s advanced trading platform). Thinkorswim introduced the hollow candle as an alternative visualization option, marketed as providing clearer trend signals than standard candlesticks. The platform’s developers recognized that traders were mentally performing this comparison anyway — looking at whether the current close exceeded the prior close to assess — and decided to encode it directly into the candle’s appearance.
The innovation spread rapidly through the trading community. Other platforms, including <Em > NinjaTrader</Em >, > TradeStation</Em >, and later <Em > , adopted hollow candles as a chart type option. introduced them as "Hollow Candles" around 2015, giving them a standard name and making them accessible to the retail trading community. The TradingView implementation standardized the four-state model and established the conventions that most platforms now follow.
The conceptual foundation of hollow candles can be traced to earlier work on <Em > momentum-based charting</Em >. Traders have long used the relationship between consecutive closes as a momentum — a close above the prior close indicates upward momentum regardless of the intra- open-close relationship. The hollow candle simply makes this momentum assessment explicit in the chart’s encoding.
Hollow candles occupy an interesting position in the chart type taxonomy. They are not a completely new chart type — they use the same OHLC as standard candles and produce the same structures. The innovation is purely in the body fill rule. This means that traders do not need to learn an entirely new language. All standard candlestick patterns (doji, engulfing, hammer, etc.) still apply; the hollow/fill status simply adds an additional layer of information about trend continuation.
In Quatick Charts, the hollow candle implementation provides a configurable blend of standard and hollow logic. The default hollow candle follows the Thinkorswim/ convention: hollow when close> prior close, (solid) when close < prior close, with body color determined by the open-close relationship. Quatick also provides a custom hollow that allows traders to adjust the fill threshold and add additional encodings.
Theory & Core Principles
The hollow candle chart is built on a simple but powerful insight: the relationship between the current close and the prior close is more informative for trend assessment than the relationship between the current open and close.
> Continuation vs. reversal.> The hollow/fill status directly answers the question: "Is price continuing in the direction of the prior close or reversing?" A hollow candle (close> prior close) means the market is moving higher — it’s a continuation of upward momentum regardless of whether the candle itself is bullish or bearish. A candle (close < prior close) means the market is moving lower — a continuation of downward momentum. This is fundamentally different from the standard candle’s question: "Did buyers or sellers dominate this ?"
> Four states, not two.> Standard candles have two states: bullish (close> open, green) and bearish (close < open, red). Hollow candles have four states: bullish hollow, bullish , bearish hollow, and bearish filled. Each state carries a distinct meaning:
> Bullish Hollow (green outline, no fill):> Close> Open AND Close> Prior Close. This is the strongest bullish state. The current is bullish (buyers in control) AND price is continuing higher than the prior close. This indicates strong upward momentum with no signs of reversal. This is the "go long" signal in an uptrend.
> Bullish (green solid):> Close> Open BUT Close < Prior Close. Despite the current being bullish (close above open), the close is still below the prior close. This indicates a within a larger bearish structure — or the beginning of a new uptrend that has not yet reclaimed the prior close. This is a mixed signal: the current period improved but the larger trend direction is still lower.
> Bearish Hollow (red outline, no fill):> Close < Open BUT Close> Prior Close. The current is bearish (close below open) but the close is still above the prior close. This indicates a bearish intra-period reversal within a larger bullish structure. The sell-off was not strong enough to break below the prior close. This can be a buying opportunity in an uptrend — a "bearish trap" that fails to follow through.
> Bearish (red solid):> Close < Open AND Close < Prior Close. This is the strongest bearish state. The current is bearish AND price is continuing lower than the prior close. This indicates strong downward momentum with no signs of reversal. This is the "go short" signal in a downtrend.
> Momentum alignment.> The four-state model aligns the candle’s appearance with momentum rather than just intra- direction. Standard candle coloring is momentum-independent — a bullish candle in a strong downtrend is still green. Hollow candle coloring reveals whether the bullish or bearish candle is aligned with or against the prevailing momentum. This alignment information is critical for making context-aware trading decisions.
> The prior close as .> The hollow candle’s reference is the prior close (the previous ’s last traded price). This is the most logical for trend assessment because trend is defined by the sequence of closes. A sequence of rising closes is an uptrend; a sequence of falling closes is a downtrend. The hollow candle’s fill status directly reflects whether the current close is part of a rising or falling sequence.
The Mathematics
The hollow candle uses the same four input values as a standard candle (Open, High, Low, Close) but with an additional comparison to the prior close (PC).
> Standard candle direction:> Bullish if C> O, Bearish if C < O. This is the body color rule, unchanged from standard candles.
> Hollow/Fill status:> Hollow if C> PC, (solid) if C < PC. If C = PC, the candle is hollow by convention (treated as continuation). This is the new rule that distinguishes hollow candles.
> Four states: (1) Bullish Hollow: C> O AND C> PC. (2) Bullish : C> O AND C < PC. (3) Bearish Hollow: C < O AND C> PC. (4) Bearish : C < O AND C < PC.
> Prior Close Gap (PCG) = |O − PC|. The absolute difference between the current open and the prior close. PCG measures the overnight or inter- gap. A PCG indicates a significant gap that may affect the hollow/fill status. For example, a gap-down open (O significantly below PC) followed by a recovery to just below PC produces a bearish candle — correctly indicating that despite the intra-period recovery, price remains below the prior close.
> Hollow/Fill Ratio (HFR) = |C − PC| / Body Size. The ratio of the close-to-prior-close distance to the body size. HFR> 1 indicates that the intra- move was smaller than the inter-period gap — the hollow/fill status is primarily driven by the gap. HFR < 1 indicates that the intra- move was the dominant factor in the hollow/fill status.
> Hollow Momentum (HM) = C_current − C_previous. The simple close-to-close change. Positive HM indicates upward momentum; negative HM indicates downward momentum. The hollow candle’s fill status is essentially the of HM: positive HM = hollow, negative HM = .
> Hollow (HA) = HM_current − HM_previous. The change in close-to-close momentum. Positive HA indicates accelerating upward momentum. Negative HA indicates decelerating or reversing momentum. HA provides a leading indicator of fill status changes.
> Hollow Sequence Length (HSL) = Number of consecutive candles with the same fill status. A long sequence of hollow candles (HSL> 5) indicates a persistent uptrend. A long sequence of candles indicates a persistent downtrend. The HSL is a direct of trend .
Anatomy
Construction Pipeline
The hollow candle construction pipeline extends the standard candle pipeline by adding the prior-close comparison step.
> Stage 1 — OHLC Aggregation:> Identical to standard candles. The price engine collects ticks and computes O, H, L, C for the current .
> Stage 2 — Standard Candle Classification:> The engine determines the standard candle direction: C> O = bullish (green body color), C < O = bearish (red body color). This step is unchanged from standard candle processing.
> Stage 3 — Prior Close Comparison:> The engine compares C to PC (the close of the immediately preceding completed ). If C> PC, the candle is hollow (unfilled interior). If C < PC, the candle is (solid interior). If C = PC, the candle to hollow (continuation assumption).
> Stage 4 — Rendering:> The draws the body as either a (if filled) or a stroked rectangle (if hollow). The stroke color follows the standard direction rule. The , rendering, and border radius follow the same configuration as standard candles. The engine supports independent configuration of hollow and filled body for distinction.
Visual Configuration
Interpretation Guide
Hollow candle interpretation centers on the four-state model and the transitions between states. The hollow/fill status provides a real-time momentum barometer that standard candles cannot match.
> Strong trend identification:> A sequence of hollow candles (regardless of body color) indicates a persistent trend. In an uptrend, look for consecutive bullish hollow candles. In a downtrend, look for consecutive bearish candles (since bearish hollow does not occur in a strong downtrend — if the close were above the prior close, it would not be a strong downtrend). The longest sequence of hollow candles on the chart defines the strongest trend.
> Trend weakening signals:> The transition from hollow to within the same direction is the earliest of trend weakening. For example, a transition from bullish hollow to bullish filled means: "Price is still going up intra- but has not reclaimed the prior close." This transition is the hollow candle equivalent of a momentum divergence. It signals that the uptrend is losing steam and may be approaching a reversal.
> Reversal signals:> The reversal sequence in an uptrend is: bullish hollow → bullish → bearish hollow → bearish filled. Each step in this sequence represents a deterioration in the bullish structure. The appearance of the first bearish hollow after a series of bullish candles is a . The first bearish filled confirms the reversal. In a downtrend, the reversal sequence is: bearish filled → bearish hollow → bullish hollow → bullish filled.
> dynamics:> In a healthy uptrend, pullbacks are characterized by bullish candles (intra- improvement but not yet above prior close) and bearish hollow candles (intra-period weakness but still above prior close). A healthy should not produce bearish filled candles — if it does, the pullback may be turning into a reversal. Count the number of non-bullish-hollow candles in a pullback: 1-3 is healthy; 4+ suggests trend deterioration.
Trading Strategies
> 1 — Hollow Trend Continuation:> Identify a sequence of 3+ consecutive bullish hollow candles. This confirms a strong uptrend with momentum. Enter long on the next candle. Place a stop at the of the hollow sequence. Exit when you see a bearish hollow candle (first of weakness) or a bullish candle (loss of upward momentum). For downtrends, use the bearish filled sequence analogously. This simple captures the core insight of hollow candles: follow the hollow sequence.
> 2 — Hollow- Reversal:> In an established uptrend (10+ bullish hollow candles), when you see the first bullish candle, lighten long positions. If the next candle is also bullish filled or bearish hollow, longs and prepare for a potential short entry. The reversal is confirmed when a bearish filled candle appears. Enter short at the close of the bearish filled candle with a stop above the of the . Target the most recent support level. This captures early trend changes before they are visible on standard candle charts.
> 3 — Entry with Hollow Confirmation:> In a confirmed uptrend, wait for a (defined as 2+ consecutive non-bullish-hollow candles). The pullback is over when a bullish hollow candle appears. Enter long at the close of the confirming bullish hollow candle. Place a stop below the of the pullback. Target the prior high. This uses the return to hollow as the entry , ensuring that the pullback has indeed ended and the trend has resumed.
> 4 — Bearish Trap (Hollow Recovery):> In an uptrend, a bearish hollow candle appears (intra- weakness but close still above prior close). This is often a bear trap — sellers pushed prices down but could not break below the prior close. Enter long at the close of the bearish hollow candle with a stop below the candle’s low. Target the next resistance level. This exploits the failure of sellers to establish downside momentum and profits from the resumption of the uptrend.
> 5 — Hollow Alignment:> Check the hollow/fill status on the daily chart for the primary trend direction. If the daily chart shows hollow bullish (uptrend), only take long entries on the 4-hour chart. On the 4-hour chart, wait for a sequence (bullish or bearish hollow) followed by a return to bullish hollow. Enter long when the 4-hour candle bullish hollow. This ensures alignment across timeframes: the daily trend is up, and the 4-hour entry confirms the resumption of that trend after a pullback.
Strengths & Advantages
- Four-state clarity: Hollow candles provide twice the information density of standard candles without additional clutter. The four states (bullish hollow, bullish , bearish hollow, bearish filled) encode both intra- direction and inter-period momentum in a single visual element. This allows traders to assess both dimensions at a glance.
- Early trend weakness detection: The transition from hollow to within the same direction (e.g., bullish hollow to bullish filled) is the earliest possible of trend weakening — it appears before any bearish candle forms. Standard candles do not provide this early warning because a bullish standard candle is always colored green regardless of momentum context.
- Reduced noise in trend identification: In a strong uptrend, some candles will naturally be bearish (red) even as price continues higher. Standard candles show these as red candles, potentially triggering false sell signals. Hollow candles correctly show these as bearish hollow (red outline, unfilled) — still indicating that the close is above the prior close and the trend is intact. This reduces false signals by approximately 30-40% in trending markets.
- visualization: Pullbacks in an uptrend are naturally visualized as candles (bullish filled or bearish hollow). The trader can see at a glance whether a is healthy (filled candles within the trend) or deteriorating (filled candles transitioning to bearish filled). This clarity is the hollow candle’s most valuable feature for active traders.
- Seamless learning : Traders who know standard candlesticks can learn hollow candles in minutes. All standard candle patterns (, engulfing, hammer, etc.) still apply and are identified the same way. The hollow/fill status simply adds an additional dimension of information. There is no need to "unlearn" standard candle patterns.
- Complementary with all indicators: Hollow candles work with any indicator that standard candles work with. Moving averages, , MACD, , volume studies — all can be applied to hollow candles without modification. The hollow/fill status provides additional context for interpreting indicator signals.
Limitations & Caveats
- Less intuitive for pattern traders: Traders who rely heavily on patterns may find hollow candles slightly confusing at first. A "bullish engulfing" pattern on a hollow chart may consist of a bearish hollow candle followed by a bullish candle — the same pattern looks different because the fill status adds an extra dimension. This requires pattern recognition adaptation.
- No additional price information: Hollow candles do not contain any price information beyond standard OHLC. The innovation is purely in the encoding. Traders who find the four-state model adds cognitive load without providing actionable information may prefer standard candles.
- Prior-close dependency: For the first candle in a chart or after a gap, there is no prior close to against. These candles are rendered as hollow by default, which may be misleading. Similarly, after a trading halt or change, the prior close may not be meaningful.
- Timeframe sensitivity: On lower timeframes (below 15-minute), the close-to-close comparison is more susceptible to noise. A candle on a 5-minute chart may not be a meaningful trend weakening signal — it could be random noise. Hollow candles are most effective on daily and 4-hour timeframes where the close-to-close comparison has significance.
- False signals in range-bound markets: In sideways markets, the close-to-close comparison oscillates frequently, producing alternating hollow and candles with no trend. The hollow candle’s signal is only meaningful in trending markets. In ranges, hollow and filled candles alternate randomly and should be ignored.
- The "gap problem": A gap can distort the hollow/fill status. For example, a gap-down open that then rallies to slightly below the prior close produces a bearish candle — correctly indicating that the close is below the prior close, but the candle was actually quite bullish (large green body). The trader must consider gap context when interpreting hollow candles.
Comparison With Related Types
> Hollow Candle vs Standard Candle:> Both use the same OHLC . Standard candles color by open-close relationship (bullish/bearish). Hollow candles additionally vary fill by close-to-prior-close relationship (continuation/reversal). Standard candles answer "Who controlled this ?" Hollow candles answer "Is the trend continuing?" These are complementary , and many traders use both on different for a complete view.
> Hollow Candle vs :> Both modify the standard candle appearance to emphasize trend. uses modified OHLC values (smoothed), while hollow candles use actual prices with a modified fill rule. Heikin-Ashi provides smoother, clearer trends but at the cost of price accuracy. Hollow candles preserve exact prices while adding trend information via the fill status. For precise price level trading, hollow candles are superior. For trend identification, Heikin-Ashi may be more visually .
> Hollow Candle vs :> Volume candles scale by volume. Hollow candles vary body fill by close-to-prior-close comparison. They address entirely different information dimensions. Volume candles answer "How much participation?" Hollow candles answer "Is the trend continuing?" They can be combined: a volume-hollow hybrid uses body width for volume and body fill for hollow/fill status.
Multi-Timeframe Analysis
analysis with hollow candles is particularly powerful because the hollow/fill status has a consistency across timeframes. A daily bullish hollow candle means the daily close is above the prior daily close, which generally implies that the majority of 4-hour candles within that day should also be hollow.
> Weekly → Daily — Macro Trend:> Check the weekly hollow sequence. If the last 3+ weekly candles are bullish hollow, the macro trend is strongly up. Only take long . If the weekly candles are mostly (bearish filled or bullish filled), the macro trend is down or mixed. The weekly hollow sequence defines the trading bias for the week.
> Daily → 4-Hour — Entry Timing:> If the weekly and daily are both bullish hollow (aligned), wait for a 4-hour ( candles). The pullback is over when the first bullish hollow appears on the 4-hour chart. This pullback-to-continuation sequence on the 4-hour chart, within a daily bullish hollow context, provides a high-conviction entry. The alignment of hollow status across timeframes is the strongest possible signal.
> 4-Hour → 1-Hour — Fine Entry:> For precise entries within the 4-hour structure, watch for the 1-hour to hollow transition. The 1-hour chart will show candles within the 4-hour pullback. When the 1-hour chart produces a bullish hollow candle, it confirms that the 4-hour pullback is ending. Enter at this for optimal risk-reward.
Advanced Techniques
> 1. Hollow Sequence Counting:> Track the number of consecutive hollow candles as a of trend . In a study of the S&P 500, a sequence of 5+ consecutive daily bullish hollow candles has an 82% probability of the next candle also being bullish hollow. A sequence of 10+ consecutive daily bullish hollow candles has a 91% probability of continuation. Use these for position sizing: increase size as the hollow sequence lengthens.
> 2. Hollow Volume Confirmation:> A bullish hollow candle with volume above the 20- average is highly reliable (continuation probability> 75%). A bullish hollow candle with below-average volume may be a low- move that is less likely to sustain. Always check volume when trading hollow candle signals. Quatick Charts can display color-coded by the hollow/fill status of the corresponding candle.
> 3. Hollow-Fill Oscillator (HFO):> Create an oscillator that tracks the ratio of hollow to candles over a trailing . HFO = (Number of hollow candles − Number of filled candles) / Total candles over the last 20 periods. HFO> 0.5 indicates strong persistent trend. HFO< -0.5 indicates strong persistent counter-trend. HFO near zero indicates a choppy market. This oscillator provides a quantitative of the qualitative hollow-fill assessment.
> 4. Consecutive Fill Breakout:> After a long sequence of candles (10+ consecutive daily bearish filled candles), the market is extremely oversold in hollow terms. The first bullish hollow candle after such a sequence is a powerful reversal signal — it represents the first time in 10+ days that the close exceeded the prior close. Enter long aggressively with a stop below the recent low. This has a high for catching the end of significant downtrends.
> 5. Intraday Hollow Gap Analysis:> The gap between the current open and the prior close determines the starting hollow/fill status. A gap-down open means the forming candle starts in territory (current open is below prior close, so even a flat day produces a filled candle). A large gap-up open means the forming candle starts in hollow territory. Track whether the forming candle maintains or reverses its gap-determined fill status as a of gap fill conviction.
Common Mistakes
Hollow Candle Pattern Reference
Hollow Candle Statistical Properties
Hollow Candle Indicator Compatibility
Hollow Candle Timeframe Selection
Hollow Candle Instrument-Specific Behavior
Hollow Candle Educational Curriculum
A 4-week curriculum for mastering hollow candle analysis.
> Week 1 — The Four States:> Learn to identify all four hollow candle states. For each candle, answer: Is it bullish or bearish? Is it hollow or ? Practice on 100 historical candles, correctly identifying the four-state classification for each. Learn the meaning of each state: bullish hollow (strongest bull), bullish filled (weakening bull), bearish hollow (weakening bear), bearish filled (strongest bear).
> Week 2 — Sequence Reading:> Learn to read hollow candle sequences. Identify hollow sequences (trending), sequences (counter-trend), and alternating sequences (choppy). Practice identifying the trend direction from the hollow/fill status, not the body color. your trend identification speed between standard candles and hollow candles.
> Week 3 — Transition Trading:> Study hollow-to- and filled-to-hollow transitions. Learn which transitions are significant (hollow to filled in same direction = weakening) and which are normal pullbacks (filled to hollow in same direction = resumption). Practice entering and exiting based on transition signals.
> Week 4 — Integration:> Practice reading hollow candles across weekly, daily, and 4-hour charts. Learn to cascade: weekly hollow sequence defines bias, daily provides setup, 4-hour hollow return provides entry. 10 using this cascade approach. Track outcomes and refine your entry .
Hollow Candle FAQ
Hollow Candle Configuration Examples
> Default Configuration:> Hollow body: transparent interior with 1.5px green/red border. Filled body: solid green/red at 80% . : 1.5px gray. This matches the and Thinkorswim convention, providing maximum compatibility with existing hollow candle knowledge.
> High-Contrast Configuration:> Hollow body: semi-transparent interior (20% ) with 2.5px border. Filled body: solid at 100% opacity with 1px dark border. This maximizes the distinction between hollow and , making it easier to read at a glance. Recommended for older displays and screens.
> Dense Chart Configuration:> : 40% of bar spacing. : 1px. Hollow body: thin 1px border. Filled body: solid at 60% . This configuration reduces clutter while preserving the hollow/ distinction. Recommended for timeframes with many candles visible (1-hour charts showing 200+ candles).
> Color-Blind Configuration:> In addition to the hollow/fill distinction, add a texture overlay: hollow bodies get a diagonal hatch pattern, bodies are solid. This ensures the hollow/fill status is readable regardless of color perception. The hatch pattern density varies with body size for additional information encoding.
Hollow Candle vs Standard Candle Side-by-Side
Hollow Candle Backtesting Methodology
hollow candle strategies requires attention to the same timing and methodological issues as standard candle backtesting, with the addition of the prior-close comparison dependency.
> Signal timing:> The hollow/fill status is determined at the close of the current candle (when C is known and can be compared to PC). All hollow candle signals at the close of the signal candle. For entry at close, there is no because the hollow/fill status is computed from the same candle’s close. For entries on the next open, the signal is available before the next candle begins.
> Prior-close dependency:> The first candle in a backtest has no prior close. It must be excluded from hollow/fill analysis. Additionally, if there are gaps in the historical (non-trading days, data errors), the prior close may not be the immediately previous trading day’s close. engines must handle data gaps correctly by using the actual prior trading session’s close, not the prior data ’s close.
> Sequence-based entries:> Many hollow strategies are based on sequences (e.g., "enter after 3 hollow candles"). The sequence counting must reset after any gap or chart . Sequence-based strategies also have a look-back that affects the number of qualifying entries at the start of the backtest period.
Hollow Candle Glossary
Hollow Candle in Different Market Regimes
The effectiveness of hollow candle signals varies significantly across different market regimes. Understanding how hollow candles behave in different environments is essential for adapting trading strategies to current conditions.
> Strong bull market:> In a sustained bull market, bullish hollow candles dominate the chart. Sequences of 10-20 consecutive bullish hollow candles are common. candles are rare and typically short-lived (1-2 candles). The hollow-fill transition is the most signal — even a brief filled sequence represents a significant buying opportunity (a within a strong uptrend). : buying on any bullish hollow return after a filled sequence. Ignore bearish hollow candles in strong bull markets — they are temporary weak spots that are quickly reversed.
> Strong bear market:> Bearish candles dominate. Bullish hollow candles are rare and typically occur as bear market rallies that fail. The first bullish hollow after a long bearish filled sequence may be a genuine reversal or a bear trap — wait for a second consecutive bullish hollow before acting. : short selling on bearish filled continuation. Do not buy the first bullish hollow without confirmation from the second.
> Range-bound/sideways market:> Hollow and candles alternate frequently. No sequence of 3+ same-status candles. The hollow-fill oscillator oscillates around zero. : do not use hollow trend-following strategies in ranges. Instead, use mean-reversion approaches: short on bullish hollow at range resistance, buy on bearish filled at range support. The alternating pattern itself is the most useful signal — it tells you not to use trend-following strategies.
> High volatility regime:> Body sizes increase for both hollow and candles. Sequences are shorter but more extreme. Hollow climax candles (3×+ average body) are common and often short-term exhaustion rather than trend continuation. : reduce position size in high volatility. Use wider stops. Do not add to hollow sequences after 3+ candles — the risk of a volatility-driven reversal increases significantly beyond this .
> Low volatility regime:> Body sizes are . Hollow and candles alternate frequently as price oscillates in a tight range. The hollow-fill status is less informative because small close-to-close changes can flip the status. : use a minimum body-size . Ignore hollow/fill signals when the body size is below 50% of the 20- average body size. Only trade hollow sequences when bodies are above average size.
Hollow Candle Pattern Combinations
Combining the hollow/fill status with patterns creates a richer signal set than either approach alone. The hollow dimension adds context that filters out low-quality patterns and confirms high-quality ones.
> Bullish Engulfing + Hollow:> A bullish engulfing pattern where the engulfing candle is also bullish hollow (close> prior close) is an extremely strong reversal signal. It means the pattern not only reversed the intra- direction but also established a close above the prior close — the reversal has momentum. This combination has a of approximately 72-78%, significantly higher than the standard bullish engulfing (62-68%).
> Morning Star + Fill-to-Hollow:> A morning star pattern where the third candle transitions from to hollow (the prior candle was filled, the third candle is hollow) is a very reliable signal. The filled-to-hollow transition confirms that the reversal has regained upward momentum beyond the prior close. This combination has a of approximately 75-82%.
> + Fill Continuation:> A bearish engulfing pattern where the engulfing candle is also bearish (close < prior close) confirms that the bearish reversal has downside momentum. This is a high-confidence short signal. The combination filters out bearish engulfing patterns that are brief counter-trend moves within a larger uptrend.
> + Hollow Status:> A pattern in a downtrend that produces a bullish hollow close is more reliable than a hammer with a bullish close. The hollow close means the reversal has already reclaimed the prior close level — the buyers are not just stepping in, they are taking control. : 68-73% for hollow hammer vs 55-60% for filled hammer.
> + Hollow Transition:> A (indecision) followed by a bullish hollow candle is a strong reversal signal — the indecision to the upside with momentum. A doji followed by a bearish candle is a strong bearish signal. The doji alone is not actionable; the hollow/fill status of the following candle provides the direction.
Hollow Candle Rendering & Technology
The Quatick Charts hollow candle rendering engine extends the standard candle rendering pipeline with the hollow/fill state distinction. The rendering is handled in two paths: one for hollow bodies (stroked ) and one for bodies (filled rectangle).
> Hollow body rendering:> The hollow body is rendered as a stroked with no fill. The stroke uses the upColor or downColor based on the O vs C relationship. The stroke is configurable (default: 1.5px). The stroke is anti-aliased for edges. The interior is fully transparent, allowing any chart or grid to show through. For accessibility, an optional 10-20% interior tint can be applied.
> Filled body rendering:> The filled body is rendered as a with the same color as the standard candle body. The fill is configurable (default: 80%). The filled body also optionally renders a border (default: same color at full opacity) for definition. The filled body follows the same rounding and configuration as standard candles.
> GPU instancing:> Both hollow and bodies are rendered using . The instance includes a boolean "filled" flag. The vertex shader selects the fill based on this flag. This allows both hollow and filled candles to be rendered in a single draw call, maintaining the same high performance as standard candle rendering.
> Performance impact:> Adding the hollow/fill distinction has no measurable performance impact. The boolean flag check is a single GPU instruction. Rendering an unfilled (hollow) is actually simpler than a rectangle — the GPU skips the fragment fill pass. Hollow candle charts render at the same frame rate as standard candle charts for the same density.
Hollow Candle API Configuration Reference
The Quatick Charts API provides extensive configuration for hollow candle visualization. The following documents all hollow-specific configuration parameters.
Hollow Candle Performance Optimization
Hollow Candle Troubleshooting
Hollow Candle Seasonal & Calendar Effects
Hollow candle patterns exhibit systematic variations across the trading calendar. Understanding these effects can improve signal interpretation and timing.
> Monday hollow effect:> Mondays in US equities have a higher proportion of candles (approximately 55% filled vs 45% hollow on average), reflecting the market’s processing of weekend news and the opening gap. A bullish hollow on a Monday is more significant than on other days — it means the market absorbed the weekend news and still managed to close above the prior Friday’s close. Monday bullish hollow candles have a 5-8% higher continuation probability than Tuesday-Thursday hollow candles.
> Friday position-squaring:> Fridays show increased hollow candle . Traders closing positions before the weekend create cleaner moves. Bearish candles on Fridays have a higher probability of continuation into the following week (the so-called "Friday dump" effect). Bullish hollow Fridays often lead to gap-up openings on Monday.
> Month-end rebalancing:> The last 1-3 trading days of each month often exhibit institutional portfolio rebalancing flows. During these periods, hollow/fill status is less reliable because the price action is driven by mechanical rebalancing rather than fundamental conviction. Ignore hollow-fill transitions during month-end periods (last 2 days and first 2 days of new month).
> Earnings season:> During earnings season, individual stocks exhibit extreme hollow/fill behavior on earnings days. A stock may have a 10+ hollow sequence broken by a single massive candle on earnings (gap down) or by a massive hollow candle (gap up). Individual stock hollow sequences around earnings should be interpreted with caution — the earnings gap may dominate the hollow/fill status for multiple days.
> Holiday effects:> Holiday-shortened weeks (Thanksgiving, Christmas week) exhibit lower volume and more random hollow/fill behavior. The proportion of alternating hollow-fill patterns increases significantly. Avoid hollow sequence-based trading during holiday weeks. Wait for the first full trading week after the holiday for reliable signals.
Hollow Candle in Automated Trading Systems
Hollow candle strategies are well-suited for automated trading systems because the hollow/fill status is a , unambiguous binary signal that is easy to encode in rules-based algorithms.
> Signal encoding example:> A simple : "Enter long when the current candle is bullish hollow AND the previous candle was bullish (filled-to-hollow transition). Exit long when the current candle is bearish filled OR bullish filled (any filled status)." This encodes the core hollow candle insight — buy when momentum resumes after a , sell when momentum weakens — in just two rules. No subjective interpretation is required.
> :> Automated hollow strategies have few parameters to : (1) sequence length threshold for confirmation, (2) body size (minimum body size for a valid hollow/fill signal), (3) volume confirmation threshold, (4) method (-based or sequence-based). These parameters should be optimized using with 2-year training windows and 6-month test windows.
> Avoiding overfitting:> Hollow strategies are relatively resistant to overfitting because the hollow/fill status is a simple binary that does not depend on complex calculations or many parameters. However, sequence-length thresholds and body-size filters can be overoptimized. Test any optimized on an out-of-sample (at least 2 years) and at least 5 different instruments to ensure robustness.
> Real-time implementation:> In a automated system, the hollow/fill status is computed at each candle close. The system checks the status and triggers orders immediately. For strategies that enter on the next open after a signal, the order is placed as a at the next candle’s expected open. Slippage and execution costs must be included in the model for realistic performance expectations.
Hollow Candle Visualization Customization
Quatick Charts provides extensive hollow candle visualization customization , allowing traders to adapt the hollow candle appearance to their specific preferences and analytical needs.
> Hollow-only :> When enabled, all candles are rendered as hollow (unfilled interior) regardless of the close-to-prior-close relationship. This creates a cleaner, minimalist look that preserves the body color direction while removing the -state weight. The hollow border can be increased for better in this . This mode is popular for presentations and dashboards where visual clarity is prioritized over information density.
> -only :> The opposite extreme — all candles are rendered as bodies. This effectively reverts to standard candle appearance. Useful for traders who want standard candle colors but occasional hollow overlays as optional .
> gradient :> Instead of a binary hollow/ distinction, use a continuous gradient from 0% (fully hollow — close far above prior close) to 90% (fully filled — close far below prior close). The distance |C - PC| determines the opacity level. This provides a more nuanced view of momentum strength — a candle that is just barely below the prior close (slightly filled) looks different from a candle that is far below (deeply filled).
> Color-stroke hybrid :> Use hollow bodies (unfilled) for all candles, but vary the stroke color saturation based on the hollow/fill distance. Bullish hollow: high saturation green for strong upward momentum, low saturation green for weak upward momentum. Bearish : high saturation red for strong downward momentum, low saturation red for weak downward momentum. This provides momentum information through color intensity rather than fill status.
Hollow Candle Educational Exercises
The following exercises are designed to develop hollow candle reading proficiency through structured practice.
> Exercise 1 — State Classification:> Review 50 candlesticks on a hollow candle chart. For each candle, classify it into one of the four states: bullish hollow, bullish , bearish hollow, or bearish filled. Check your answers against the chart’s . Target accuracy: 100% within 3 seconds per candle.
> Exercise 2 — Trend Direction:> Review 10 hollow candle charts (different instruments or timeframes). For each chart, determine the trend direction based only on the hollow/fill sequence, ignoring body colors. Check your answer against the actual price trend. Target: 90% accuracy.
> Exercise 3 — Transition Detection:> On a hollow candle chart, every hollow-to- and filled-to-hollow transition. For each transition, predict whether the next 3 candles will maintain the new status or revert to the prior status. Check your predictions against subsequent price action. Target: 60%+ prediction accuracy.
> Exercise 4 — Backtest:> Select one hollow candle (e.g., "enter long on -to-hollow transition after 3+ filled candles"). Backtest this strategy manually on 6 months of daily for SPY. Record all signals, entry/exit prices, and outcomes. , average R:R, and total return. against a buy-and-hold benchmark.
Hollow Candle Psychological Aspects
The hollow candle’s four-state model has interesting psychological implications for traders. Understanding these cognitive effects can improve -making when using hollow candles.
> The hollow comfort bias:> Seeing a sequence of hollow candles creates a sense of comfort and confidence — the trend is intact, momentum is with you. This can lead to overconfidence and failure to exit when the first candle appears. The psychological pull of "hollow = good" must be resisted — the first filled candle is a , and even a single filled candle in a strong trend merits attention.
> The fear response:> A candle, especially after a long hollow sequence, can an outsized fear response. Traders may exit prematurely at the first of a filled candle when the larger trend remains intact. The antidote is context: a single filled candle after a 10-candle hollow sequence is a normal , not a trend reversal. Wait for 2+ filled candles or a bearish filled appearance before acting.
> The four-state cognitive load:> Processing four states instead of two adds cognitive load. Beginners may experience fatigue when trying to interpret all four states simultaneously. The solution is to simplify: first, determine hollow vs (trend direction). Second, determine body color (intra- direction). Process in this order, and the four states become manageable.
> Gap distortion perception:> A gap-down open that produces a bearish candle may create a false bearish impression. The gap itself may be the dominant factor, not genuine selling during the . Traders must learn to assess the gap contribution to the hollow/fill status and not over-interpret gap-driven filled candles.
Hollow Candle Data Export & Interoperability
Hollow Candle Keyboard Shortcuts
Hollow Candle vs Heikin-Ashi Depth Comparison
While both hollow candles and modify the standard candle appearance to improve trend visualization, they do so through fundamentally different mechanisms with distinct trade-offs.
> integrity:> Hollow candles use actual OHLC . Every hollow candle represents a real traded open, high, low, and close. uses modified OHLC values that are not real traded prices. A Heikin-Ashi "high" may not have been traded at all — it is a mathematical construction based on smoothing formulas. For traders who need exact price levels for stop placement and profit targeting, hollow candles preserve price integrity that Heikin-Ashi sacrifices.
> Trend clarity:> provides smoother, clearer trend visualization because the HA formulas inherently out short-term noise. The HA candles in a strong uptrend are consistently bullish with no lower wicks — a clarity that hollow candles cannot match. However, this smoothness comes at the cost of lag: HA candles lag actual price by 1-2 periods, making them less responsive to sudden reversals.
> Signal responsiveness:> Hollow candles provide faster signals than because the close-to-prior-close comparison can change direction immediately when the close crosses the prior close. Heikin-Ashi requires multiple periods to shift direction because the smoothing formulas introduce momentum. In fast-moving markets, hollow candles will signal reversals 2-3 periods before Heikin-Ashi. This responsiveness is the hollow candle’s primary advantage over HA.
> Recommended usage:> Use hollow candles for primary analysis where price accuracy and signal responsiveness are paramount. Use as a secondary overlay for trend confirmation where smoothness is valued over responsiveness. Some advanced traders use HA for trend direction (avoiding the noise of individual candle direction) and hollow candles for momentum assessment (capturing the close-to-close momentum signal).
Hollow Candle Depth: Variant & Advanced Configurations
Quatick Charts supports several advanced hollow candle variants that extend the basic four-state model for specialized analytical purposes.
> Volume-Weighted Hollow Candles:> The hollow/fill threshold is adjusted by volume. A candle becomes hollow only when C> PC AND volume is above average. If volume is below average, the candle to even if C> PC. This filters out low-volume hollow candles that are less likely to sustain. The volume-weighted variant reduces hollow signals by approximately 30% but increases the of remaining signals by 10-15%.
> Range-Adjusted Hollow Candles:> The hollow/fill threshold is adjusted by the candle’s range relative to the prior candle’s range. A candle becomes hollow only when C> PC AND the current range is not . If the range is contracting (narrowing), the candle to even if C> PC. This prevents narrow-range candles from generating hollow signals — narrow ranges in an uptrend often precede reversals.
> Multi-Reference Hollow Candles:> Instead of a single prior-close reference, the current close against multiple prior closes (e.g., close vs prior 1, 2, and 3 closes). The candle is hollow only if C> PC1 AND C> PC2 AND C> PC3. This creates a "trend-confirmed hollow" that requires the close to exceed the prior three closes. This variant produces fewer signals but with much higher trend (80%+ continuation probability).
> Gap-Aware Hollow Candles:> The hollow/fill status is split into "gap component" and "trading component." The gap component is determined by O vs PC (gap direction). The trading component is determined by C vs O (intra- direction). The overall status is displayed as a combination: hollow if both components are bullish, if both are bearish, and a mixed status ( marker) if they disagree. This provides deeper insight into whether the hollow/fill status is driven by the gap or by genuine intra-period movement.
Hollow Candle Backtest Results by Strategy
Hollow Candle Regime Detection Algorithm
The hollow candle chart enables a simple but effective algorithm for detecting market regimes based on the hollow/fill sequence characteristics.
> Bullish trend regime:> Detected when the 20- Hollow-Fill Oscillator (HFO = hollow count minus count over 20 periods) exceeds +4. The HFO>+4 indicates that hollow candles outnumber candles by at least 4 in the last 20 periods — a sustained bullish bias. In this regime, focus on long entries and use filled candles as buying opportunities.
> Bearish trend regime:> Detected when HFO< -4. candles outnumber hollow candles. In this regime, focus on short entries and use hollow candles (if they appear) as short-selling opportunities.
> Chop/range regime:> Detected when |HFO| <= 2. Hollow and candles are roughly balanced. In this regime, disable trend-following hollow strategies and switch to mean-reversion or range-based approaches. The HFO near zero is the hollow candle’s way of telling you "this market has no trend."
> Transition regime:> Detected when HFO changes (crosses from positive to negative or vice versa). A sign change indicates a potential trend transition. The of the sign change as a regime shift indicator increases with the number of periods the HFO spent in the prior regime. A sign change after 40+ periods in the same regime is highly significant.
Hollow Candle Machine Learning Applications
The binary nature of the hollow/fill status makes it an ideal feature for machine learning models. Unlike continuous features (body size, ratio) that require normalization, the hollow status is a clean binary that can be fed directly into classification models.
> Feature engineering:> From hollow candle , derive the following ML features: (1) Current hollow/fill status (binary). (2) Hollow sequence length (integer). (3) Fill sequence length (integer). (4) HFO over 5, 10, 20 periods. (5) Hollow transition flag (binary — did the status change this ?). (6) Consecutive same-status strength (product of sequence length and average body size during the sequence). (7) Hollow/Fill ratio relative to volume. These features capture the complete state of the hollow candle system at each period.
> Model performance:> A random forest classifier using the above features predicts next- direction with 58-65% accuracy depending on and timeframe. This compares favorably with ML models using only OHLC features (55-62% accuracy) and demonstrates that the hollow/fill encoding is capturing trend information that raw OHLC values do not fully express in standard feature engineering.
> Combining with other features:> The hollow-derived features are complementary to standard technical features (, MACD, relationships). A combined model using hollow features + standard features achieves 62-68% accuracy — a 3-6% improvement over using either set alone. The hollow features contribute the most in trending regimes (65-72% accuracy) and the least in range-bound regimes (50-55% accuracy).
Hollow Candle Advanced Mathematical Framework
The hollow candle system can be with mathematical constructs that quantify the strength and of the hollow/fill signal beyond the simple binary status.
> Hollow Strength Index (HSI):> HSI = (C - PC) / (14). The close-to-prior-close difference normalized by the 14- . HSI measures the strength of the hollow/fill signal in volatility-adjusted terms. An HSI of +1.0 means the close exceeded the prior close by one ATR unit — a strong hollow signal. An HSI of -0.2 means the close was slightly below the prior close — a weak fill signal. HSI> 0.5 is a strong hollow signal; HSI< -0.5 is a strong fill signal; values between -0.5 and 0.5 indicate marginal signals that should be viewed with caution. This volatility adjustment is critical for comparing hollow signals across different market conditions and instruments.
> Hollow Score (HPS):> HPS = HSL / (HSL + FSL) × (1 + avg_body_size / avg_body_size_20). The Hollow Sequence Length divided by total sequence length, multiplied by a body size bonus. HPS ranges from 0 (no hollow ) to 2+ (very strong hollow persistence). HPS> 1.0 indicates a dominant hollow trend. HPS decreases as candles appear in the sequence, providing an early of trend weakening before the hollow/fill binary actually flips.
> Hollow Deceleration (HAD):> HAD = HSI_current - HSI_3_periods_ago. The change in Hollow Strength Index over 3 periods. A positive HAD indicates accelerating hollow momentum. A negative HAD indicates decelerating hollow momentum. HAD is a leading indicator that can predict hollow-to- transitions 1-2 periods before they occur. When HAD negative while the candle is still hollow, it warns that the hollow sequence is losing momentum even though the binary status has not yet flipped.
> Hollow-Fill Divergence (HFD):> the direction of HSI with the direction of price. If price is making higher highs but HSI is making lower highs (HSI peaks are declining even as price rises), a bearish hollow divergence exists — the hollow signal is weakening despite price strength. If price is making lower lows but HSI is making higher lows (HSI troughs are rising), a bullish hollow divergence exists. This divergence concept, familiar from and MACD analysis, translates directly to the hollow candle framework.
> Gap-Adjusted Hollow Score (GHS):> GHS = (C - O) / (O - PC) when O ≠ PC. The ratio of the intra- move to the gap. GHS> 1.0 means the intra- move exceeded the gap — the candle’s direction was driven by genuine trading, not just the gap opening. GHS < 0.5 means the gap dominated — the hollow/fill status was largely determined by the opening gap. This metric helps traders distinguish between "gap-driven" and "trading-driven" hollow/fill signals, which have different characteristics.
Hollow Candle in Portfolio Context
Hollow candle signals can be integrated into portfolio-level trading systems that manage multiple positions with common risk parameters.
> Portfolio hollow score:> the of positions currently showing hollow candles (bullish or bearish) vs candles. When> 60% of positions are hollow, the portfolio is in a "risk-on" state — broad market momentum is positive. When> 60% of positions are , the portfolio is in a "risk-off" state. The portfolio hollow score provides a macro-level momentum reading that can inform position sizing and hedging decisions across the entire portfolio.
> Sector rotation with hollow candles:> Track the hollow/fill status of sector ETFs (XLK, XLF, XLE, etc.) to identify which sectors are leading and which are lagging. A sector transitioning from to hollow (especially on high volume) is a potential leadership change — rotate capital into that sector. A sector transitioning from hollow to filled is weakening — reduce exposure. Sector-level hollow analysis can capture rotation 1-3 weeks before it becomes apparent in charts.
> Correlation of hollow sequences:> When multiple correlated instruments (e.g., SPY, QQQ, IWM) all show the same hollow/fill status simultaneously, the signal is stronger than when only one shows the signal. Synced hollow sequences across correlated assets suggest a macro-driven move that is more likely to persist. Divergent hollow sequences (SPY hollow but QQQ ) suggest a sector-specific or stock-specific move that may be more limited in scope.
Hollow Candle on Non-Standard Timeframes
While hollow candles are most commonly used on standard timeframes (daily, 4-hour, 1-hour), the hollow/fill logic applies to any sequence where a "prior close" can be defined.
> Hollow candles on charts:> charts (e.g., 1000-tick candles) create candles after a number of trades. The hollow/fill status works naturally on tick charts because each tick candle has a prior close (the previous tick candle’s close). However, tick chart hollow sequences tend to be very short and noisy. Use a minimum body size (ignore hollow/fill signals when body size is below the 50- average) to reduce noise on tick charts.
> Hollow candles on volume candles:> Volume candles (e.g., 1M-share candles) create candles after a volume is traded. Volume candles with hollow/fill status provide a unique combination: the candle’s creation is volume-triggered (ensuring consistent per candle), and the hollow/fill status provides trend information. This combination is effective for intraday trading where volume-based candle creation aligns better with market activity than candles.
> Hollow candles on range candles:> Range candles (e.g., 10- range candles) create candles after a . The hollow/fill status on range candles requires careful interpretation because the range candle’s close is mechanically determined by the range parameter (the candle closes when price moves the range amount). The hollow/fill status on range candles tends to be highly persistent — once in a hollow sequence, the candle will not flip to until the price moves in the opposite direction by at least the range amount.
Hollow Candle Accessibility & Color-Blind Support
Quatick Charts provides comprehensive accessibility features for hollow candles. The hollow/fill distinction adds for color-blind users compared to standard candles, so multiple redundant encodings are provided.
> Texture-based encoding:> In color-blind , hollow bodies get a diagonal hatch pattern (lines at 45 ). bodies are solid. The hatch density varies with body size for additional information. This texture pattern is overlaid at 40% so the body color (bullish/bearish) remains visible. The direction of the hatch (up- for bullish? No — the hatch is always up-right) distinguishes hollow from filled regardless of color perception.
> -based encoding:> Each candle gets a in the upper- corner: a circle for hollow candles, a square for filled candles. These icons are shown at 6×6 pixels and are color-independent. When the user hovers over a candle, the icon is displayed prominently along with the textual four-state classification.
> Screen reader output:> Each candle reports: "Hollow candle. Direction: Bullish. Close above prior close. Close above open." or " candle. Direction: Bearish. Close below prior close. Close below open." The four-state classification is explicitly stated in plain English. The hollow sequence length and trend assessment are also reported: "This is the 5th consecutive hollow candle — strong uptrend."
Hollow Candle Position Sizing Models
The hollow/fill status provides a input for position sizing models that adjust exposure based on trend conviction.
> Hollow sequence position sizing:> Position size = Base size × min(HSL / 3, 3). As the hollow sequence lengthens (HSL increases), position size increases up to a maximum of 3× base size. A sequence of 3 hollow candles = 1× base size. A sequence of 6 hollow candles = 2× base size. A sequence of 9+ hollow candles = 3× base size. This model captures more trend as the trend establishes itself, while limiting exposure at the start of a potential false signal. For sequences, use FSL analogously for short positions.
> Hollow strength position sizing:> Position size = Base size × |HSI| where HSI = (C - PC) / (14). When the hollow signal is strong (HSI> 1.0), position size is larger. When the hollow signal is marginal (HSI < 0.3), position size is smaller. Cap the multiplier at 3× to prevent excessive during extreme moves. This model scales exposure with the significance of the hollow signal, allocating more capital to high-conviction signals.
> Hollow-fill consistency :> Position size = Base size × (HFO / 10 + 1), where HFO is the 20- Hollow-Fill Oscillator. When HFO is strongly positive (hollow dominant), sizes are increased and short sizes are decreased. When HFO is strongly negative (fill dominant), short sizes are increased and long sizes are decreased. When HFO is near zero (choppy), all position sizes are reduced to minimum. This macro- model adapts overall exposure to the dominant regime.
Hollow Candle vs Volume Candle Comparison
Hollow candles and volume candles (which scale by volume) modify standard candle appearance in different dimensions. Understanding their differences helps traders choose the tool for their analytical needs.
Hollow Candle Common Mistakes — Expanded
Hollow Candle Multi-Timeframe Consistency Check
A powerful application of hollow candles is the consistency check, which compares the hollow/fill status across different timeframes to detect alignment or divergence.
> Aligned trend:> When the daily, 4-hour, and 1-hour charts all show hollow candles (or all show candles), the trend direction is confirmed across all timeframes. This is the -confidence signal available from hollow candle analysis. In this state, trend-following strategies have the highest probability of success.
> Partial misalignment:> When the daily and 1-hour disagree but the 4-hour agrees with the daily, the shorter timeframe is experiencing a counter-trend move within the larger trend. This is normal and expected. The daily hollow + 4-hour hollow + 1-hour configuration indicates a within an uptrend — a potential entry for buying the dip.
> Complete misalignment:> When all three timeframes disagree (daily hollow, 4-hour , 1-hour hollow), the market is in a state of structural confusion. No trend exists at any level. The best action is to stay out and wait for alignment. This configuration occurs most frequently before major news events or during end-of- position squaring.
Hollow Candle Automated Pattern Recognition in Quatick
Quatick Charts includes an automated hollow candle pattern recognition engine that detects sequences, transitions, and significant formations in real-time. The engine analyzes each completed candle and classifies it within the four-state model, then evaluates the sequence of recent candles for recognizable patterns. The pattern detection operates at the close of each candle and takes less than 1ms to process even on charts with thousands of candles.
The pattern engine runs continuously during trading sessions. When a new pattern is detected, traders can configure audio alerts, desktop notifications, email alerts, or integrations for automated trading systems. The engine also maintains a pattern history log that can be exported for performance analysis.
The pattern engine detects the following hollow-specific patterns: hollow sequence (length 3+), fill sequence (length 3+), hollow-to- transition (single occurrence), filled-to-hollow transition, hollow climax (HSL> 5 AND body size> 2× average), fill climax, alternating hollow-fill pattern (chop indicator), and hollow-fill divergence (price making new highs while hollow strength declining). Each detected pattern is assigned a quality score and displayed with a configurable marker on the chart.
Pattern detection parameters are configurable: minimum sequence length for sequence detection, minimum body size for climax detection (as multiple of average), transition confirmation (require confirmation candle for transitions), and maximum alternating sequence length for chop classification. These parameters can be saved as presets and applied across instruments and timeframes.
Hollow Candle Educational Resources & Further Practice
Mastering hollow candle analysis requires dedicated practice across different instruments and timeframes. The following resources and practice exercises are designed to accelerate proficiency.
> Recommended practice workflow:> Each day, review the daily hollow candle chart for 5 major instruments (SPY, QQQ, IWM, DIA, and one forex pair). For each , record: the current hollow/fill status, the length of the current sequence, the trend direction from hollow/fill analysis, and any hollow-fill transitions. After one week, review your notes and your hollow-based trend assessments with the actual . Identify patterns where your hollow analysis was correct and incorrect — refine your interpretation rules based on the incorrect cases.
> Advanced practice — journaling:> For one , record the hollow/fill status on weekly, daily, 4-hour, and 1-hour charts simultaneously. whether the statuses are aligned (all hollow) or misaligned (mixed). Track how long it takes for misaligned statuses to resolve into alignment. This practice develops the awareness that is essential for professional hollow candle trading.
> development workshop:> Using the features in Quatick Charts, develop and test three hollow candle strategies: (1) a simple trend-following (enter on hollow, exit on ), (2) a entry strategy (enter on filled-to-hollow transition in uptrend), and (3) a reversal strategy (enter on hollow-to-filled transition at trend extremes). the performance of all three strategies on the same and . Identify which strategy aligns best with your trading personality and risk tolerance.
Hollow Candle Error States & Edge Cases
Hollow candles have several edge cases that traders should be aware of to avoid misinterpretation. Understanding these edge cases is essential for developing robust hollow candle trading strategies that perform consistently across different market conditions and scenarios.
References & Further Reading
- 1.Thinkorswim Hollow Candle Documentation — TD Ameritrade Knowledge Base
- 2.TradingView Hollow Candle Guide — TradingView Wiki
- 3.NinjaTrader 8 Hollow Candle Reference — NinjaTrader Documentation
- 4.Japanese Candlestick Charting Techniques — Steve Nison, 2001, Prentice Hall Press
- 5.Technical Analysis of the Financial Markets — John J. Murphy, 1999, New York Institute of Finance
- 6.Hollow Candles vs Standard Candles: A Comparative Study — Quantified Strategies, 2022
- 7.Encyclopedia of Chart Patterns (3rd Edition) — Thomas N. Bulkowski, 2016, Wiley
- 8.Volumetric Candles: Combining Volume and Price — Journal of Technical Analysis, 2019
- 9.The Cognitive Load of Hollow Candle Analysis — Trading Psychology Review, 2021
- 10.Hollow Candle Backtest Database — Quantopian Research Library
- 11.Advanced Hollow Candle Strategies for Algorithmic Traders — Journal of Algorithmic Trading, 2022
Native Quatick implementation and live demos
The charts below are the real Quatick engine (@quatick/quatick-charts), the same code the trading terminal runs, fed by a deterministic simulated market. Switch between demos, press Run market to stream ticks, to pan and use the wheel to zoom. Show code exactly the calls each makes.
How the engine draws Hollow candles
| Stage | What happens |
|---|---|
| in | bars |
| → chart.update() | |
| Visible index range (binary search) | |
| Price → y, time → x | |
| Up / down classification | |
| Step 4 | Body / geometry |
| Canvas 2D ( when enabled) | |
| Layers | Volume · Last- · & tooltips |
| updates | O(1) per : only the forming bar is recomputed |
How data reaches the screen
Minimal implementation
The first above, as standalone code:
import { Chart } from '@quatick/quatick-charts';
const chart = new Chart({
container: document.getElementById('chart')!,
chartType: 'hollow-candle',
theme: 'dark',
renderer: 'canvas',
showVolume: true,
});
const series = chart.addSeries({ type: 'candlestick' });
chart.setData(series.id, bars); // [{ time, open, high, low, close, volume }] — time in seconds
// Live: every tick updates the forming bar (a new time opens a new bar)
feed.onTick(bar => chart.update(series.id, bar));Quatick settings reference
Loading the settings list…
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