Key Takeaways
- Chart patterns are recurring price shapes that traders read as signs a trend is likely to reverse or continue.
- Head and Shoulders and Double Top/Bottom are classic reversal patterns, marking a likely end to the current trend.
- Triangles, Flags and Pennants are typically continuation patterns, a pause before the prior trend resumes.
- A pattern is only considered confirmed once price actually breaks out of it, trading the pattern before that break is guesswork.
- You can practice spotting these patterns on real historical charts in our free backtesting tool.
What Is a Chart Pattern?
A chart pattern is a recognizable shape formed by price over a series of swing highs and lows, one that has historically tended to precede either a reversal of the existing trend or a continuation of it after a pause. Patterns are read against support and resistance levels, covered in our technical analysis overview, and are generally split into two groups: reversal patterns and continuation patterns.
Reversal Patterns
- Head and Shoulders: three peaks, a higher middle peak (the head) flanked by two lower, roughly equal peaks (the shoulders), with a connecting "neckline" drawn under the two troughs between them. Forming after an uptrend, a break below the neckline is read as a bearish reversal signal. The Inverse Head and Shoulders is the same shape flipped upside down, forming after a downtrend, with a break above the neckline read as bullish.
- Double Top: two roughly equal peaks separated by a moderate pullback, forming after an uptrend. A break below the support level between the two peaks (the "swing low") is read as confirmation of a bearish reversal.
- Double Bottom: the mirror image, two roughly equal troughs separated by a moderate rally, forming after a downtrend. A break above the resistance between the two troughs is read as a bullish reversal signal.
Continuation Patterns
- Triangles (ascending, descending, symmetrical): price contracts into a narrowing range as a trendline connecting the highs converges with a trendline connecting the lows. An ascending triangle (flat top, rising bottom) is typically read as bullish; a descending triangle (flat bottom, falling top) as bearish; a symmetrical triangle is directionally neutral until it actually breaks one way.
- Flags: a sharp, near-vertical price move (the "flagpole") followed by a brief, tight, parallel-channel pullback (the "flag") against that move, before typically resuming in the original direction.
- Pennants: similar to a flag, a sharp move followed by a brief pause, but the pause takes the shape of a small symmetrical triangle rather than a parallel channel.
How to Trade a Chart Pattern
A pattern forming on a chart is not itself a signal, it only becomes actionable once price breaks out of it, closing decisively beyond the pattern's defining line (a neckline, a swing high or low, a trendline). Trading the anticipated direction before that break happens is guesswork, since a large share of apparent patterns fail to break the way they "should."
Once a breakout is confirmed, many traders estimate a target by measuring the height of the pattern, head-to-neckline, or flagpole length, and projecting that same distance from the breakout point. A stop loss is typically placed on the opposite side of the pattern, so if the breakout proves false, the trade exits with a defined, limited loss rather than an open-ended one.
Practice Spotting Patterns on Real Price Data
Chart patterns take repetition to recognize reliably in live, noisy price action. Our free backtesting and market replay tool lets you step through real historical charts bar by bar, across 17 markets and 7 timeframes, pausing the moment a pattern starts to form and watching exactly how, or whether, it actually played out.
Frequently Asked Questions
Do chart patterns actually work?
They capture real, recurring crowd behavior around support, resistance and shifting momentum, so they're a genuinely useful read of a chart. They are probabilities, not certainties, and a meaningful share of patterns that start to form never complete or break the expected direction.
What is the most reliable chart pattern?
No single pattern is reliable in every market condition. Patterns that align with the broader trend direction (continuation patterns within a strong trend) generally have better odds than reversal patterns attempting to call a top or bottom against a strong trend.
Should I enter a trade before a pattern breaks out?
Generally not recommended. A pattern is only confirmed once price actually breaks its defining line with a decisive close; entering beforehand on the assumption it will break a certain way is a significantly lower-probability bet.
How do I set a target after a pattern breaks out?
A common method is the "measured move": take the height of the pattern itself (for example, the distance from the head to the neckline in a Head and Shoulders) and project that same distance from the breakout point in the direction of the break.