Constructing bullish bottom patterns from structure and confirmation

Draw the structure before you name the pattern

Editorial reading: the archive workflow is to construct the bounding structure first, then wait for a defined close through the confirmation line. A familiar silhouette is not itself a buy signal.

A confirmation line is the price that must be closed through before the pattern is treated as valid. That price may be a neckline, the highest high between multiple bottoms, or an equivalent trendline.

Before a trade hypothesis is treated as live, price should close above the relevant trendline or confirmation line. Acting earlier raises the chance that the pattern never completes.

How to construct a head-and-shoulders bottom

A head-and-shoulders bottom is a three-trough bottom in which the center low sits below two roughly equidistant, similarly priced shoulder lows. In construction terms, that means three lows with the head below the shoulders and the two shoulder lows near the same price and nearly equally spaced from the head.

A neckline through the two shoulder highs defines the breakout level. When that line slopes upward, the higher shoulder high is used as the breakout price so a steep neckline is not required to be pierced.

Volume on a head-and-shoulders bottom is usually highest on the left shoulder, lower on the head, and lower still on the right shoulder, though a given chart may not follow that sequence.

How to construct a diamond bottom

A diamond bottom is a consolidation that first widens like a broadening bottom and then narrows like a symmetrical triangle. Construction requires at least two touches of the bounding lines and repeated price crossings inside them.

Diamond bottoms are often lopsided rather than symmetrical. Volume typically trends downward from the start of the formation to the end.

A close inspection of a diamond can reveal a head-and-shoulders bottom instead. The two outlines should be checked against each other before a hypothesis is locked in.

Broadening bottoms and the partial decline

Editorial reading: the widening half of a diamond follows the same construction as a broadening bottom. A broadening bottom is an expanding range after a downtrend, bounded by a rising high trendline and a falling low trendline. It needs higher highs and lower lows, with at least two minor highs and two minor lows near the outlining trendlines and plenty of crossings between them.

A partial decline is a retreat from the upper trendline that turns up before reaching the lower trendline. In the source sample it is followed by an upward breakout 80% of the time, but it can fail. It is an early upward-breakout clue, not a completed trade signal, and it does not replace a confirmed close through the structure.

Confirmation first, then the throwback

A throwback is the return of price toward the neckline area after an upward close through that line. On the illustrated head-and-shoulders bottom it appears as a post-breakout condition.

Treat a throwback as a return toward the breakout area after a confirmed move through a neckline or other confirmation line. It is not a substitute for waiting until that line is actually cleared.