Head and Shoulders Pattern

The classic topping structure — and why it is not a pattern until the neckline breaks

A head and shoulders is a bearish reversal pattern made of three peaks: a left shoulder, a higher head, and a right shoulder roughly level with the left. It completes when price closes below the neckline drawn through the two lows between the peaks.

Chart data

#	Open	High	Low	Close
1	90	94	89.6	93.6
2	93.6	100	93.2	99.6
3	99.6	104	99	100.2
4	100.2	100.6	95	95.4
5	95.4	99	95	98.6
6	98.6	106	98.2	105.6
7	105.6	112	105	106.2
8	106.2	106.6	99	99.4
9	99.4	100	94.6	95
10	95	99.6	94.6	99.2
11	99.2	104.2	98.6	99.6
12	99.6	100	94.4	94.6
13	94.6	95	88	88.4
14	88.4	89	84	84.6
15	84.6	85.4	80	80.6

At a glance

What timeframe does it work on?

This is a structural pattern that needs room to form, so it is most reliable on daily and weekly charts where the three peaks represent weeks or months of failed attempts to make new highs. Intraday versions exist but are far noisier, because a single session can produce three peaks that carry no information about the broader balance of supply and demand. Larger patterns generally imply larger subsequent moves.

Anatomy of the pattern

• Left shoulder (LS) — A peak formed during the existing uptrend, followed by a pullback. On its own it is unremarkable — every uptrend makes peaks and pullbacks.
• Head (H) — A higher peak than the left shoulder, followed by a decline back toward the previous low. This is still consistent with a healthy uptrend at this stage.
• Right shoulder (RS) — A third peak that fails to reach the head's high, roughly level with the left shoulder. This is the informative part: buyers tried again and could not make a new high, which is the first structural evidence the trend is failing.
• The neckline — A line drawn through the two lows between the peaks. It may slope up or down slightly. This is the level that completes the pattern — until price closes below it, there is no head and shoulders, only three peaks.
• The measured move — The conventional target measures the vertical distance from the head down to the neckline, then projects that same distance below the breakdown point.

How to identify it

1. There is a pre-existing uptrend — the pattern must have something to reverse.
2. Three distinct peaks are visible, with the middle one clearly the highest.
3. The left and right shoulders are roughly comparable in height; neither needs to be exact.
4. The two lows between the peaks can be joined by a plausible straight line — the neckline.
5. Volume typically declines across the three peaks, and is often lowest on the right shoulder.
6. Price closes below the neckline. Until this happens the pattern is potential, not confirmed.

How to trade it

Entry. The standard entry is a close below the neckline, which is what completes the pattern. A common variation waits for the retest — price frequently returns to the neckline from beneath after breaking it, offering a second entry at a better price with a tighter stop, at the cost of missing the moves that never look back.

Stop. Above the right shoulder for a position taken on the neckline break, or above the retest high for a retest entry. The right shoulder is the last point at which buyers demonstrably failed, so a move above it removes the pattern's premise. Stops placed just above the neckline are too tight and get taken out by the retest itself.

Target. Measure from the head down to the neckline and project that distance below the breakdown. Sizeable patterns can imply targets far away, so check the intervening structure — prior support levels and prominent lows will often interrupt the move well before the projection is reached.

What invalidates it

• The neckline has not broken. This is by far the most common error: identifying a head and shoulders while price is still above the neckline and trading it pre-emptively. Until the close beneath it, there is no completed pattern.
• The right shoulder exceeds the head. Then buyers did make a new high, the structural argument disappears, and the trend is intact.
• There was no prior uptrend. A three-peak shape inside a long-running range is not a reversal of anything.
• Price closes back above the neckline after breaking it. Failed breakdowns from this pattern often resolve sharply upward, because the traders positioned short are all wrong at the same level.
• The pattern is drawn on noisy intraday data where three peaks form routinely. The shape needs enough time to represent genuine repeated failure.

Often confused with

• Bull Flag — A bull flag tightens and stays shallow before continuing upward; a head and shoulders forms three distinct peaks and resolves downward. If the pause is deepening and making identifiable peaks rather than contracting, it is not a flag.

How reliable is the head and shoulders pattern?

The head and shoulders is the most studied chart pattern in the technical analysis literature and one of the few with support from outside it — academic work on technical patterns has tended to find head-and-shoulders formations among the more statistically interesting, though findings differ by market and period and several studies conclude any edge is small once trading costs are included. Two caveats matter more than the numbers. First, almost every quoted success rate is measured from a confirmed neckline break, while a large share of real-world failures come from traders acting before that break — those failures never appear in the statistics. Second, pattern identification is partly subjective: how level the shoulders must be, and how the neckline is drawn, materially change which formations qualify. The pattern's genuine strengths are an unambiguous completion trigger and a clearly defined invalidation level, which is more than most patterns offer.

References

• Thomas N. Bulkowski. Encyclopedia of Chart Patterns . Wiley , 2005 . ISBN 978-0471668268.
• Robert D. Edwards and John Magee. Technical Analysis of Stock Trends . Routledge , 2018 . ISBN 978-0815350675.
• Andrew W. Lo, Harry Mamaysky and Jiang Wang. Foundations of Technical Analysis: Computational Algorithms, Statistical Inference, and Empirical Implementation . The Journal of Finance , 2000 .

Frequently asked questions