Chart Patterns

High Tight Flag

Also called: HTF

A rare, powerful continuation pattern: a near-vertical 100%+ advance, then a shallow, tight flag that often launches another sharp leg up.

100%+ pole
Schematic of a high tight flag — illustrative geometry, not a live price chart.

Popularized by William O'Neil, the high tight flag forms when a stock roughly doubles in four to eight weeks (the flagpole), then drifts sideways-to-down no more than about 10–25% over a few weeks (the flag). A shallow pullback after an explosive move signals holders refuse to sell — extreme demand.

The buy point is a breakout above the flag on strong volume. It's one of the most bullish, and rarest, patterns; the same violent prior move that makes it powerful also makes it volatile and prone to failure, so risk control matters.

On StockSetups

High tight flags surface among the continuation patterns on the StockSetups board, where the relative-strength rating and tight-range flags (NR7, tight closes) help separate a genuine high tight flag from an overextended spike.

Related terms

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