Mastering Chart Patterns: Unlocking the Secrets of Head and Shoulders, Triangles, and Flags

Explore head and shoulders, triangles, and flags patterns to boost your trading acumen.

Image source: Head and Shoulders Bottom - ChartSchool - StockCharts.com

Chart patterns are recurring price shapes in technical analysis that traders use to infer whether a move is likely to reverse or continue. Head and shoulders is usually a reversal pattern, triangles are often continuation patterns, and flags are also typically continuation patterns.¹^{, 6}^{, 7}

Head and shoulders

A head and shoulders top has three peaks: a left shoulder, a higher head, and a right shoulder that stays below the head. A neckline connects the lows between the peaks, and a break below that neckline is the usual confirmation of a bearish reversal. The inverse version works the same way in reverse and often signals a bullish reversal.⁵^{, 1}

Triangles

Triangles form when price range narrows and trend lines converge, creating a squeezing shape. The three common types are symmetrical, ascending, and descending triangles; they are usually treated as continuation patterns, though they can sometimes reverse a trend. Traders typically watch for the breakout direction and then measure a target from the triangle’s widest point.⁶^{, 10}^{, 14}

Flags

Flags appear after a strong, sharp move and then a short consolidation that slopes slightly against the prior trend or moves sideways. The “pole” is the impulse move, and the “flag” is the pause; a breakout in the direction of the original move is the usual signal. Bull flags suggest continuation upward, while bear flags suggest continuation downward.⁷^{, 15}

How they differ

Pattern	Typical role	Shape	Common confirmation
Head and shoulders	Reversal	Three peaks with a neckline	Break of neckline ¹^{, 5}
Triangles	Usually continuation	Converging trend lines	Breakout from the triangle ⁶^{, 14}
Flags	Usually continuation	Small consolidation after a sharp move	Breakout in the prior trend direction ⁷^{, 15}

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