Chart Patterns: Reversals, Continuations and Failures

Chart patterns are shapes a market has drawn before, that often appear again, with mixed results. This guide covers multi-swing price formations: head and shoulders, double and triple top/bottom, rounding tops and bottoms, rectangles, triangles, flags and pennants, wedges, cup and handle. Candle-scale patterns live in a separate guide. This article is educational, not personal advice. This article follows our editorial policy.

Chart patterns in 30 seconds

• A chart pattern is a repeating multi-swing shape, drawn by at least a few bars on the chart.
• A pattern is not a prediction. It is a template for a decision: wait for a stated confirmation, then plan the order, the stop and the target before acting.
• The measured move is a projection, not a promise. Each pattern has a stated convention for the distance; the convention does not guarantee that the price gets there.
• Reversal, continuation and bilateral are categories, not laws. Any pattern can fail; a failed reversal does not have to resolve into a continuation and can also drift into further consolidation, and a failed continuation does not have to reverse. The next move is read on the chart, not forced by a label.
• Two documented SPY rectangle cases below show the same rule reaching its target in one window and being invalidated in another.

A compact comparison of common patterns

Scroll the table sideways on a phone to see every column.

Pattern	Appearance	Prior context	Confirmation (this guide)	Measured move	Common failure after confirmation
Head and shoulders	Left shoulder, higher head, right shoulder	Uptrend	Daily close below neckline	Head to neckline distance	Daily close back above neckline
Inverse head and shoulders	Mirror of head and shoulders	Downtrend	Daily close above neckline	Head to neckline distance	Daily close back below neckline
Double top (M)	Two swing highs at a similar level	Uptrend	Daily close below intervening low	Peak-to-trough height	Daily close back above intervening low
Double bottom (W)	Two swing lows at a similar level	Downtrend	Daily close above intervening high	Trough-to-peak height	Daily close back below intervening high
Triple top/bottom	Three swings at a similar level	Trend	Same as double, after three swings	Same as double	Same as double
Rounding bottom	Slow rounded bowl	Downtrend	Daily close above pattern high	Bowl depth	Daily close back below mid-pattern
Rounding top	Mirror of rounding bottom	Uptrend	Daily close below pattern low	Bowl depth	Daily close back above mid-pattern
Rectangle	Horizontal top and bottom lines	Trend or sideways	Daily close beyond horizontal line	Height of the rectangle	Daily close back inside the rectangle
Ascending triangle	Horizontal top line, rising lower line	Uptrend	Daily close above top line	Width at pattern start	Daily close back below top line
Descending triangle	Horizontal bottom line, falling upper line	Downtrend	Daily close below bottom line	Width at pattern start	Daily close back above bottom line
Symmetrical triangle	Two converging lines	Trend	Daily close beyond near line	Width at pattern start	Daily close back through the broken line
Bull flag	Steep up move, shallow downward consolidation	Uptrend	Daily close above upper flag line	Length of flagpole	Daily close below the flag’s lower line
Bear flag	Mirror of bull flag	Downtrend	Daily close below lower flag line	Length of flagpole	Daily close above the flag’s upper line
Pennant	Flag with converging lines	Trend	Same as flag	Length of flagpole	Daily close against pole direction
Rising wedge	Two upward-sloping lines, lower line steeper	Uptrend or downtrend	Daily close below lower line	No standard; use discretion	Daily close back above upper line
Falling wedge	Two downward-sloping lines, upper line steeper	Downtrend or uptrend	Daily close above upper line	No standard; use discretion	Daily close back below lower line
Cup and handle	Rounded bottom, shallow pullback on the right	Uptrend	Daily close above handle high	Depth of the cup	Daily close back below handle low

The table is a compact description, not a promise. Volume rules are soft signals, and none of the confirmations above requires them.

What a chart pattern is

A chart pattern is a multi-swing shape with a stated confirmation rule. The shape is drawn by at least three or four price swings; the rule names the condition that turns the shape into a trade decision. Without the rule, a pattern is a drawing.

What this guide does not cover is one-bar and two-bar candle setups. Hammer, engulfing, inside bar, piercing and dark cloud cover live on a different scale: a single candle or a small sequence. The honest count of how often each one really occurs sits in the candlestick patterns guide; the method for reading each candle sits in the how to read candlestick charts guide.

The guide also does not cover indicator crosses. The 50-day and 200-day moving-average crossing is an indicator pattern, not a chart pattern, and belongs with the golden cross and death cross guides, where the counts are run on long price histories.

Reversal patterns

Reversal patterns are shapes that often appear at the end of a trend. The word “often” is doing work: the same shape can appear mid-trend and resolve as a continuation.

Head and shoulders

A head and shoulders is a left shoulder, a higher head and a right shoulder, with a neckline connecting the two swing lows between them. The inverse flips the geometry: a left shoulder, a lower head and a right shoulder, with the neckline across the two swing highs. The neckline is often sloped; a horizontal reading is a special case.

• Confirmation on this guide is a daily close beyond the neckline. An intraday pierce that closes back is not confirmation.
• Invalidation after confirmation is a daily close back on the other side of the neckline.
• Measured move: the vertical distance between the head and the neckline, projected from the neckline break.

Double top and double bottom

A double top is two swing highs at a similar level, with a swing low between them. A double bottom is the mirror: two swing lows at a similar level with an intervening swing high.

• Confirmation is a daily close below the intervening swing low (double top) or above the intervening swing high (double bottom).
• Measured move: the vertical distance between the pair of peaks (or the pair of troughs) and the intervening trough (or peak) between them, projected downward from the confirmation level for a double top, or upward for a double bottom. The two swings are at a similar level by definition, so the measurement runs between those swings and the point in between, not between the two swings themselves.
• A tolerance band around the first swing is reasonable; the two swings do not need to match exactly. The same touch tolerance idea as in the range trading guide works here.

Triple top and triple bottom

A triple top is three swing highs at a similar level, with two intervening lows. The triple bottom is the mirror. The confirmation level is the lower of the two intervening lows (triple top) or the higher of the two intervening highs (triple bottom). The measured move is the height from the peaks (or troughs) to that confirmation level.

Rounding top and bottom

A rounding bottom is a slow bowl shape at the end of a downtrend; a rounding top is the opposite at the end of an uptrend. The pattern takes weeks or months and has no sharp confirmation level. Many traders use the highest high of the bowl (bottom) or the lowest low of the bowl (top) as the confirmation line; the measured move is the depth of the bowl, projected from the confirmation.

Continuation patterns

Continuation patterns are shapes that often appear inside a trend. The caveat is that a pause is not a guarantee of resumption; a trend can also end at a continuation pattern that fails.

Rectangles

A rectangle is a horizontal range with a measured move. It is the same shape as a trading range: a flat top, a flat bottom, and several swings between them.

• Confirmation is a daily close beyond the horizontal boundary.
• Invalidation after confirmation is a daily close back inside the rectangle at any time during the stated holding window (this guide uses 10 trading sessions after entry, matching the worked SPY cases below).
• Measured move: the height of the rectangle, projected from the break in the direction of the break.

Triangles

A triangle narrows a prior swing between two converging trendlines. Three variants are named: ascending, descending and symmetrical. The direction of the eventual break is not fixed by the shape alone and is read on the chart.

• Ascending triangle: a horizontal top line and a rising lower line. The common reading is a bullish continuation.
• Descending triangle: a horizontal bottom line and a falling upper line. The common reading is a bearish continuation.
• Symmetrical triangle: both lines converge. The direction is read on the chart.

Confirmation on triangles is a close beyond the near line, in the direction of the break. The near trendline is the one that price has approached last; the measured move is the width of the triangle at the start of the pattern, projected from the break. Trendline trading covers how to draw the two lines with a stated rule.

Flags and pennants

A flag is a short, shallow consolidation that slopes against a prior sharp move (the flagpole). A pennant is a flag whose two lines converge instead of staying parallel.

• Confirmation is a daily close beyond the flag channel (or the pennant’s near trendline) in the direction of the pole.
• Measured move: this guide uses one convention, the length of the flagpole, projected from the break. Other authors use shorter projections; stay with one convention per plan.
• Invalidation after confirmation is a close against the pole direction, inside the flag or beyond its opposite line.

Wedges

A rising wedge is two upward-sloping lines, with the lower line steeper, so the pattern narrows upward. A falling wedge is two downward-sloping lines, with the upper line steeper, so the pattern narrows downward. Both lines point the same way; what makes them a wedge is the convergence.

• The common reading is that a rising wedge is a bearish setup when the lower line breaks, and a falling wedge is a bullish setup when the upper line breaks. The reading is a convention; the actual direction is read on the chart.
• Confirmation is a daily close beyond the near line, against the convergence.
• Measured move: no single standard. This guide does not quote a measured-move convention for wedges; use discretion, or treat the wedge as a direction-only signal.

Cup and handle

A cup and handle is a rounded bottom (the cup) followed by a shallow pullback (the handle) on the right side. The pattern often forms over weeks on daily charts of individual stocks; it is less common on broad index charts, where the handle tends to be noisier.

• Confirmation is a daily close above the handle’s high.
• Measured move: the depth of the cup, projected from the confirmation.
• A failure after confirmation is a close back below the handle’s low.

How to read a formation in practice

Reading a pattern is a sequence, not a snap decision. The order is the same for every formation; a missing step is a shortcut, not a trade.

1. Draw the pattern with information then available. If the right shoulder is not finished, the pattern is not a pattern yet.
2. Wait for the stated confirmation rule. Daily close, two-bar close: whichever the plan says, it says it before the trade.
3. Plan the order and the stop. A breakout entry is a stop order through the confirmation level, or a market order at the next open after a daily close beyond the confirmation level; a pullback entry is a limit order at a retest. Pre-placed stops and close-based decisions are different alternatives, not interchangeable.
4. Assess nearby obstacles. A measured move that passes through a prior swing high or a known supply zone is not a target; the obstacle is.
5. Decide the exit before the trade. Trailing, break-even, scaling: one method per plan.

Projections are estimates, not promises. A measured move is a defensible target because it is defined before the trade; it is not a defensible target because the market has to go there.

Two SPY rectangle cases under one illustrative rule

Both cases use the same stated rule, applied to Yahoo Finance regular-session daily data. The window rule is the same as in the range trading guide: the last 14 trading sessions, both inclusive; the window’s maximum high is the top line and the minimum low is the bottom line; the window qualifies when at least two sessions touch the top line within 0.4 percent, at least two sessions touch the bottom line within 0.4 percent, the absolute least-squares slope of daily closes divided by the mid-price is at most 0.07 percent per session, and the width divided by the mid-price is between 2 and 4.5 percent. Boundaries are frozen at the end of the window.

• Entry alternative A (used here). A daily close above the top line is a confirmation close. Entry is a market order at the next US cash open after the confirmation close. This is a decision after the fact; it is not an order waiting in the book during the confirmation bar.
• Entry alternative B (not used here, named for contrast). A pre-placed buy stop at the top line plus a buffer. This fills intraday on a touch; the fill price is not guaranteed and can be worse than the stop in a fast market or at a gap.
• Confirmation window. Watch the next 10 trading sessions after the frozen 14-session window. Take the first daily close above the top only if no earlier close below the bottom occurred during this watch window. Closes inside the range before confirmation are allowed. After entry, a daily close back below the top line invalidates the trade, with an exit at the next US cash open.
• Target sell limit. For this long trade, a resting sell limit sits at the top line plus the window width, projected upward from the top boundary. The target fills on the first session whose high reaches or exceeds the limit, at or above the limit price.
• Protective sell stop. At the window’s bottom. A gap through the stop fills at the next available price; the stop cannot be assumed to fill at a specific price.
• Expiry. 10 trading sessions, counting the entry session as session 1. If no target hit and no close-based invalidation inside the window, the trade is closed at the open on the session after expiry.
• Same-session ambiguity. If the stop and the target are both touched inside one session, mark the trade ambiguous.
• Costs budget. A 0.06 per share illustrative round-trip allowance is used for the net result. It is a hypothetical modelling choice, not a verified broker quote; actual costs and slippage depend on the broker, the account type, the fill venue and the market at the time.
• Educational caveat. Both cases are retrospectively selected hypothetical illustrations of mechanics, not a backtest and not a personal recommendation.

Loss: 2020-12 to 2021-01

• 14-session window: 2020-12-01 to 2020-12-18. Top line = window high 372.46 on 2020-12-17. Bottom line = window low 363.26 on 2020-12-11. Width 9.20 points. Target = 372.46 plus 9.20 equals 381.66.
• First daily close above the top: 2020-12-31 at 373.88 (Yahoo Finance regular-session close). No prior daily close below 363.26 in the same window.
• Entry 2021-01-04 open 375.31.
• 2021-01-04 high 375.45 is below the target; low 364.82 is above the stop; daily close 368.79 is below the top line 372.46, which triggers the close-based invalidation.
• Exit 2021-01-05 open 368.10.
• Gross loss: 375.31 minus 368.10 equals 7.21 per share. Net loss: 7.27 per share after 0.06 illustrative round-trip allowance. The initial stop-distance risk at the protective stop was 375.31 minus 363.26 equals 12.05 per share, which is not a cap on the possible loss because gaps and fast markets can fill worse.

Win: 2021-03 to 2021-04

• 14-session window: 2021-03-09 to 2021-03-26. Top line = window high 398.12 on 2021-03-17. Bottom line = window low 383.90 on 2021-03-25 (Yahoo Finance regular-session low). Width 14.22 points. Target = 398.12 plus 14.22 equals 412.34.
• First daily close above the top: 2021-04-01 at 400.61. 2021-04-02 was Good Friday (markets closed). Entry 2021-04-05 open 403.46.
• No daily close back below 398.12 (the top line, which under the invalidation rule exits the long at the next open) and no touch of the 383.90 stop inside the next 10 sessions. 2021-04-12 daily high 411.93 (below the target). 2021-04-13 daily high 413.53 at or above the 412.34 target; the hypothetical target sell limit fills at 412.34.
• Gross reward: 412.34 minus 403.46 equals 8.88 per share. Net reward: 8.82 per share after 0.06 illustrative round-trip costs. The initial stop-distance risk was 403.46 minus 383.90 equals 19.56 per share.

Two cases, one won and one lost, under the same stated rule. This is a description of two cases, not a win rate. The breakout trading guide covers a related count of 1,472 daily closes beyond a 10-bar extremum, which is a related but different event; this guide does not quote it as a rectangle success rate.

Checklist and limits

• Pick one timeframe for the pattern and keep it. A daily pattern and a 1-hour pattern on the same chart are separate decisions, not one trade.
• Draw the pattern with information then available. A pattern on a historical chart is easier than a pattern on the right edge of a live chart.
• State the confirmation rule. Daily close, specified distance, two-bar close: one rule per pattern.
• State the invalidation. The price at which the pattern is wrong, before the trade.
• The measured move is a convention. Each pattern has one; keep the same convention across trades.
• Reversal, continuation and bilateral are labels for the plan. A failed reversal does not have to resolve into a continuation; a failed continuation does not have to reverse. The chart decides.
• Protective broker-side stop and close-based invalidation are different orders. State both before the trade.
• Same-session ambiguity. If the stop and the target are both hit in one session, mark the trade ambiguous.
• Volume rules are soft signals. A low-volume break can still work; a high-volume break can still fail.
• Avoid best-pattern rankings. Any “most reliable chart pattern” claim without a reproducible method, a sample and a cost assumption is marketing.

Frequently asked questions about chart patterns

Which timeframe works best for chart patterns?

The timeframe matches the holding period, not the pattern. A rectangle on a 5-minute SPY chart is a different trade from one on a daily SPY chart, with different costs. The multi-timeframe analysis guide covers how to pick the base.

Which chart patterns are bullish and which are bearish?

The chart decides, not the name. By convention, an ascending triangle, a double bottom, a bullish flag, a falling wedge, a cup and handle and an inverse head and shoulders are bullish setups; their mirrors are bearish. The pattern becomes bullish or bearish when a close confirms it, not before.

What is the most reliable chart pattern?

There is no honest short answer. Reliability depends on the market, the timeframe, the costs, the exit rule and the sample size. Any claim of a general success rate for one named pattern needs a method, data and an out-of-sample test.

Do chart patterns work in forex and crypto?

They draw the same shapes. Whether they work in the same way is a question for a backtest, not for an opinion: cost structures, session effects, 24-hour trading and, in forex, the lack of a single centralised exchange-wide daily close across venues each change the result.

Can software recognise chart patterns automatically?

Yes, software can detect several named patterns, with limits. Several platforms detect head and shoulders, triangles, flags and double tops. The judgement about nearby obstacles, timing and trend context is not inside the detection rule. Treat an auto-detected pattern as a candidate, not as a signal.

What should I do when a chart pattern fails?

Take the invalidation and move on. The invalidation is the price in the plan, not a feeling at the chart. The next trade is a new pattern, with its own written rules.

Sources we checked for pattern conventions

• CME Group education, Trend and continuation patterns: used for the rectangle, triangle and flag definitions.
• CME Group education, Technical patterns reversals: used for the head and shoulders and double / triple top-bottom confirmation descriptions.
• Bulkowski (2012), Wiley chapter 11 summary page: used for the flag versus pennant distinction (parallel lines versus converging) and the prior-flagpole requirement.

Further reading, not used as sources here

• Thomas N. Bulkowski, Encyclopedia of Chart Patterns (second edition, 2005).
• Robert D. Edwards and John Magee, Technical Analysis of Stock Trends (first published 1948).