Price Channel

The extremes of a range are the two prices in it that every participant can see and agree on. They are where stops cluster, where breakout orders rest, and where the market has already demonstrated that it turned. Drawing them as explicit levels turns a visual impression of “the recent range” into two numbers you can trade against.

The rolling version of this idea is the Donchian channel, named forRichard Donchian, whose trend-following work in the mid-twentieth century built systems around breakouts from the highest high and lowest low of a fixed lookback. The same construction is the core of the Turtle trading rules taught by Richard Dennis, where entries came from breaking a 20-period extreme and exits from breaking a shorter one.

The channel is also the measuring stick for a range breakout: the height between the extremes projects a target beyond the break, on the same measured-move reasoning that rectangle and triangle patterns use. A wide range that took many bars to build projects further than a narrow one.

The tool takes 2 clicks. The anchors select a time range: the tool then reads every bar between them, finds the highest high and the lowest low, and draws each as a horizontal boundary. A minimum of two bars must fall in range before “highest” and “lowest” mean anything.

Only the time of each anchor matters. Their vertical position is ignored entirely, which is why both grips use a horizontal resize cursor. Dragging an anchor changeswhich bars are in the sample, not where the lines go — the lines go where the data puts them. If you want boundaries you can place by hand, the Parallel Channel or the Flat Top/Bottom Channel are the tools for that.

The sample is resolved by time rather than by screen position, so panning and zooming the chart cannot change which bars are included. An anchor dragged onto the same bar twice cannot silently produce a different range.

Why this is a drawing tool and not an indicator. A Donchian indicator recomputes its window on every bar, so its boundaries step down as old extremes roll out of the lookback. That is a different instrument. Here the window is a decision — “the range that formed between these two swings” — and the boundaries are fixed levels. Fixed levels can be traded against, annotated and compared across timeframes; a stepping indicator cannot.

Range breakout: enter on a close beyond either boundary, in the direction of the break. The measured-move target is the range height projected from the broken level: a range between 100 and 120 that breaks upward projects 140. Place the stop back inside the range, below the broken boundary, which should now act as support.

Range trading: while the boundaries hold, sell near the high and buy near the low with the midline as the first target. This is the opposite trade to the breakout and the two are incompatible, so the decision of which regime you are in has to come first — usually from the higher timeframe trend and from whether the range is contracting or holding width.

False breakout reversal: a push beyond a boundary that closes back inside has run the stops resting there and found no continuation. Entering against the break, with a stop beyond the excursion’s extreme, is the classic trap trade — the same structure the Wyckoff method calls a spring at the low and an upthrust at the high.

Stop placement reference: even without trading the channel directly, the extremes are the levels beyond which the range thesis is wrong. That makes them defensible stop locations for any position taken inside the range.

1. 1
   Decide what range you mean

   The tool answers whichever question your anchors ask. “The consolidation since the earnings gap” and “the last 50 bars” are different ranges with different extremes.
2. 2
   Click the start of the range

   Only the time matters — click anywhere vertically on the first bar you want included.
3. 3
   Click the end

   The two levels appear immediately at the extremes of the bars in between.
4. 4
   Read the markers

   Check where the extreme dots landed. If the high was set on the very first bar, consider whether that bar belongs in the range at all.
5. 5
   Extend right

   Set Extend to Right so the levels project forward as breakout triggers rather than only describing the past.

• An extreme set on the most recent bar means the range is still being tested at that edge; one set long ago means the market has drifted away from it.
• A narrow range over many bars is compression and usually resolves with an expansion. A wide range over few bars is already volatile and its extremes are less likely to be respected.
• Price sitting persistently in the upper half suggests the eventual break is more likely to be upward, and vice versa. The midline is what makes that visible.
• A boundary tested several times without breaking is a stronger level than one touched once — but each test also consumes the orders defending it.
• Because the levels are fixed, they remain valid reference points long after the range ends. Old range extremes frequently act as support and resistance months later.

Nested ranges across timeframes: draw a price channel on the daily and another on the hourly within it. When the hourly range breaks in the direction of the daily range’s pressure, the two agree; when it breaks against, it is more likely a false break inside the larger range.

Volume at the extremes: check the volume on the bars the markers identify. An extreme printed on very high volume is a level the market fought over and is more likely to matter later. One printed on thin volume is closer to an accident of the session and is more easily broken.

Comparison with the ATR Channel: both describe how much room price needs, from different data. The price channel reports the single largest excursion in the window; the ATR channel reports the typical bar range. A price channel much wider than an ATR channel over the same bars tells you the range is defined by one or two outlier bars rather than by sustained volatility — and the extreme markers will show you exactly which bars those were.

• 1.Donchian Channels — Investopedia
• 2.Price Channels — ChartSchool — StockCharts
• 3.Technical Analysis of the Financial Markets — John J. Murphy
• 4.Encyclopedia of Chart Patterns — Thomas N. Bulkowski
• 5.Way of the Turtle — Curtis Faith
• 6.Wyckoff Method: Spring & Upthrust — StockCharts