Bull Flag

Identification Criteria

• A strong, fast, high-volume rally forms the flagpole.
• The flag itself is a tight, short-duration consolidation that drifts sideways to slightly down, forming a small parallel channel.
• Volume characteristically dries up noticeably during the flag, then expands again on the breakout.
• The flag is brief relative to the flagpole — typically a small fraction of the time it took to form the pole; a consolidation lasting as long as the pole itself is more likely a different pattern altogether.

Formation Logic

The flagpole reflects a burst of strong buying interest. The flag represents a brief pause for profit-taking by short-term traders, absorbed calmly by the market rather than triggering a real reversal, before the underlying buying pressure that drove the pole reasserts itself.

Breakout / Confirmation Rule

Confirmation requires a decisive close above the upper boundary of the flag's consolidation channel, ideally on a pickup in volume. A flag that drifts down too steeply, or for too long, starts to resemble a genuine reversal rather than a pause.

Measured-Move Price Target

A commonly used, purely illustrative technique: measure the length of the flagpole (from its start to its high), then project that same distance above the breakout point — the "flagpole-length" projection is one of the more mechanical measured-move rules in classical chart pattern analysis.

Common Pitfalls

• A flag that retraces more than roughly half the flagpole is a warning sign that the move may already be reversing rather than merely pausing.
• Flags that drag on far longer than the flagpole took to form lose their continuation character.
• Low-volume breakouts from the flag channel are prone to failure.