What it means
The pattern is a mirror image of the ordinary head and shoulders, which signals a market top. Here the price falls to a first low (the left shoulder), rebounds, falls to a deeper low (the head), rebounds again, and then falls to a third low that is shallower than the head (the right shoulder).
The two rebound highs can be joined by a line called the neckline. Analysts read the pattern as a shift in the balance between buyers and sellers.
Each time the price reaches the head, sellers fail to push it lower for long, and at the right shoulder buyers step in earlier than before. The pattern is considered confirmed only when the price closes above the neckline, ideally with a rise in trading volume.
Technical analysts also use the pattern to set a price target. The usual rule is to measure the vertical distance from the head's low to the neckline and add it to the breakout point.
This is a rule of thumb, not a guarantee. In a business setting, the pattern is relevant to treasury teams, investor relations staff and anyone who watches a company's own share price or a commodity it buys.
A confirmed reversal might prompt a company to delay a share buyback or to bring forward the purchase of a raw material. Like all chart patterns, it is judged by eye, so two analysts may disagree on whether it has formed.
False signals are common. A price may break above the neckline and then fall back, so many traders wait for a retest of the neckline or place a stop-loss order (an instruction to sell automatically at a set price) below the right shoulder.
In practice
Real-world examples.
Example
A technology share has fallen for five months from $90 to $40. It forms three distinct lows, with the middle low the deepest, and then closes above the line joining the rebounds. An analyst at an investment firm publishes a note calling the downtrend over.
Example
A food manufacturer tracks the price of cocoa. After the price forms an inverse head and shoulders and breaks upward, the purchasing manager brings forward a contract to buy next quarter's supply, expecting costs to rise.
Example
A currency trader sees the same pattern on a euro to dollar chart. She waits for the price to retest the neckline from above before buying, and she places her stop below the right shoulder to limit the loss if the breakout fails.
Formula
Calculation
Price target = neckline breakout price + (neckline price - low of the head)
Suppose a share forms a left shoulder low of $44, a head low of $40 and a right shoulder low of $44, with a neckline at $50. The distance from the head to the neckline is 50 - 40 = $10. When the price breaks above $50, the target is 50 + 10 = $60. A trader who buys at $51 with a stop-loss at $45 risks 51 - 45 = $6 per share for a possible gain of 60 - 51 = $9, a reward-to-risk ratio of 9 / 6 = 1.5.Case study
Seen in the real world.
Thornfield Components is an illustrative, fictional manufacturer whose share price fell from $30 to $18 over a year. Its investor relations manager noticed that the chart had formed three lows at $20, $18 and $20, with a neckline near $24.
When the price closed at $25 on heavy volume, she briefed the chief financial officer that technical analysts would likely read this as a reversal. Using the measured-move rule, the target was 24 + (24 - 18) = $30.
The board paused a planned share buyback until the move played out, reasoning that the price might soon be higher. The illustrative lesson is that chart patterns can inform timing decisions, but only as one input beside fundamentals.
Watch out
Common mistakes.
- Calling the pattern before the price has closed above the neckline, when the signal is not confirmed until the breakout happens.
- Treating the price target as a promise, when it is only a rule of thumb that fails fairly often.
- Applying the pattern to a market with no clear prior downtrend, because a reversal pattern needs something to reverse.
Questions
People also ask.
Does the pattern need to be perfectly symmetrical?
No, real patterns are untidy, and shoulders may differ in depth and width, but the head must be the lowest of the three lows.
Why does trading volume matter?
A rise in volume on the breakout suggests that many buyers are committing to the move, which makes a false breakout less likely.
How is it different from a double bottom?
A double bottom has two similar lows, while an inverse head and shoulders has three with the middle one clearly the deepest.
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