Flat Top/Bottom Channel

Both patterns this tool draws are contracting formations: one side of the range is pinned to a fixed price while the other advances toward it, so the vertical distance between support and resistance narrows over time and builds tension toward a breakout.

A flat top forms when sellers consistently defend a horizontal price level while buyers push up from successively higher lows. It is structurally identical to theascending triangle in classical chart pattern analysis. Thomas Bulkowski, in “Encyclopedia of Chart Patterns,” documents ascending triangles with a bullish bias in bull markets (approximately 65% break upward) and a bearish bias in bear markets (approximately 60% break downward).

A flat bottom is the mirror: buyers defend a horizontal support level while sellers push down from progressively lower highs, producing a descending triangle with a bearish resolution bias. Bulkowski documents descending triangles as continuation patterns — in bear markets roughly 65% break downward, with an average decline of about 13% after the breakdown. Richard Schabacker first catalogued both formations in the 1930s, andJohn Murphy developed the theory further in his classic text.

The measured move principle applies to both. The pattern depth — the distance from the flat line to the furthest point of the sloped line — projects a minimum post-breakout target, which gives the trader a concrete objective rather than only a directional bias. TheWyckoff method adds an important exception for the flat-bottom case: a false breakdown that quickly reverses is the “spring,” a trap of short sellers and a powerful bullish reversal signal.

The tool takes 3 clicks. The first two set the sloped boundary — drag between the two pivots the trend line runs through. The third places the horizontal boundary at whatever price you click.

Which pattern you get is decided by that third click. Click above the sloped line and the flat boundary becomes resistance, giving a flat top; click below it and the flat boundary becomes support, giving a flat bottom. There is nothing to choose in the palette beforehand, because the drawing itself supplies the answer. This is why the two former entries — “Flat Top Channel” and “Flat Bottom Channel” — are now one tool.

The Flat side setting in the properties panel controls this. Its default,Auto, honours the third click exactly. Setting it to Flat top orFlat bottom instead constrains the horizontal line to that side of the sloped line, so a click on the wrong side snaps to the nearest valid level. Use the explicit values when you want the side locked; leave it on Auto otherwise. Drawings saved under the old separate tools carry the matching explicit value, so they keep the shape they were drawn with.

After placement there are three grips: one at each end of the sloped line, and a square grip on the horizontal line that raises and lowers it. The square grip always sits on the line as drawn, so when the side is constrained the grip follows the constrained level rather than floating where the click landed. The horizontal boundary always spans the sloped line’s own time extent, so the two boundaries start and finish together and the fill is a clean trapezium.

On Auto the two boundaries are allowed to cross. A converging triangle drawn slightly past its apex is a shape traders draw deliberately, and the fill and hit testing handle a crossed pair correctly.

Flat top — breakout long (primary setup): Enter on a confirmed close above the flat boundary with above-average volume. The measured move target is the pattern depth added to the breakout level: if the deepest support was at 80 and the flat top is at 100 (depth = 20), the target is 120. Place the stop below the most recent support swing low or below the flat top (now expected support), whichever is wider.

Flat bottom — breakdown short (primary setup): Enter on a confirmed close below the flat boundary with above-average volume. The measured move target is the depth projected downward: if the highest resistance was at 120 and the flat bottom is at 100 (depth = 20), the target is 80. Place the stop above the most recent lower high or above the flat bottom (now expected resistance), whichever is tighter.

Pullback entry (role reversal): After the break, wait for price to retest the flat boundary from the other side. Former resistance should now act as support, and former support as resistance. Enter on the reaction at the flipped level with a stop beyond the retest extreme. This typically offers a better risk/reward ratio than chasing the initial break.

Failed breakdown long (Wyckoff spring): On a flat bottom, if price breaks below the flat boundary but reverses back above it within one or two bars on strong volume, the spring has trapped short sellers. Enter long with a stop below the breakdown low. This is one of the higher-probability bullish reversal setups documented by Richard Wyckoff in his accumulation/distribution theory.

Early entry (aggressive): Trade the sloped boundary toward the flat one — buy rising support in a flat top, sell falling resistance in a flat bottom — with a tight stop beyond the most recent swing. This trades the contraction before the break, requires more active management, and offers shrinking profit potential as the range narrows.

1. 1
   Identify the flat level

   Find a price where the market has reversed at least twice — downward for a flat top, upward for a flat bottom. Two touches is the minimum for a valid pattern.
2. 2
   Draw the sloped boundary

   Click the first pivot of the sloped line, then drag and click the second. For a flat top this is the rising sequence of higher lows; for a flat bottom, the falling sequence of lower highs.
3. 3
   Place the flat boundary

   Click at the flat price level. Clicking above the sloped line gives a flat top, below it gives a flat bottom. The horizontal line spans the sloped line’s time extent automatically.
4. 4
   Verify the pattern

   Check that the flat level has 2+ touches and the sloped line connects legitimate pivots rather than being fitted to noise.
5. 5
   Refine and annotate

   Drag the square grip to fine-tune the flat level, or either circular grip to adjust the slope. Turn on the background fill to make the compression visible and note the pattern depth for the measured move.

• Each test of the flat boundary that fails to break through confirms its strength for the moment, but each test also wears it down.
• The sloped boundary shows which side is becoming more aggressive — rising support means buyers are willing to pay progressively more; falling resistance means sellers will accept progressively less.
• As the channel narrows, the break becomes imminent. Volume typically contracts during compression and expands on the break.
• A false break that reverses back inside traps late entrants. On a flat bottom this is the Wyckoff spring and is a bullish reversal signal in its own right.
• The pattern depth projects the minimum move after the break, added to the breakout level or subtracted from the breakdown level.
• A break on below-average volume is suspect and more likely to fail. Wait for volume confirmation.

Volume confirmation: Volume should contract during compression and expand on the break. A break bar at 1.5x or more of the 20-bar average volume is strong confirmation; a flat or below-average break bar is more likely a trap or a slow grind that retests.

Multi-timeframe context: A flat top inside a daily uptrend has a strong bullish bias; inside a weekly downtrend the same pattern is more likely to fail or produce a smaller move. The mirror holds for flat bottoms. Always check the higher timeframe trend before trading the break, because both formations can resolve against their nominal bias when the larger trend opposes them.

Momentum divergence at the flat touches: If successive touches of the flat boundary show weakening momentum on RSI or MACD, the break in that direction is more likely to fail. If momentum builds across the touches, the break is more likely to follow through.

Volume profile confluence: If the flat boundary aligns with a high-volume node, the level is institutionally significant and a break through it is a strong signal that the resting interest there has been overwhelmed. Aligned with a low-volume node, a break means considerably less and is more prone to reversal.

• 1.Flat top/bottom drawing tool — TradingView Help
• 2.Ascending Triangle — ChartSchool — StockCharts
• 3.Descending Triangle — ChartSchool — StockCharts
• 4.Encyclopedia of Chart Patterns — Thomas N. Bulkowski
• 5.Technical Analysis of Financial Markets — John J. Murphy
• 6.Technical Analysis and Stock Market Profits — Richard Schabacker (1932)
• 7.Wyckoff Method: Spring & Upthrust — StockCharts
• 8.Triangle Patterns — A Complete Guide — Investopedia