Intermediate5 min2026-05-13Open

Double Top & Bottom

Two peaks, two troughs. The simplest reversal pattern, marking 'the failure of the second attempt'. Neckline, target, and the moment the M or W completes.

Double TopDouble BottomReversalNecklineChart Pattern

Overview

A double top (an "M top") forms two roughly equal peaks at the top of an uptrend, then reverses. On the chart it looks like the letter "M".

A double bottom (a "W bottom") is the inverse — two roughly equal troughs at the bottom of a downtrend, then a reversal. It looks like a "W".

Simpler than a head and shoulders, and more frequent. Its essence: "price tried the same level a second time and could not exceed it". That means the force driving the trend has finally reached its limit.

The Structure (a Top)

First peak (left peak): a high within the uptrend, then a pullback (just a pullback so far)
Trough (neckline level): the pullback low — this later becomes the "neckline"
Second peak (right peak): another rally reaching roughly the first peak's height — but failing to exceed it. In Dow Theory terms, the failure to make a new high. Buyers have lost the strength to push another leg higher.
Neckline break: the decline from the second peak clearly breaks below the trough (the neckline) on a close basis → the double top completes, the reversal is confirmed.

The neckline

The trough between the two peaks. Usually roughly horizontal.

The double top is "complete" only when the neckline is clearly broken on a close basis. Front-running a short while the second peak is still forming is betting on an unconfirmed pattern. If the second peak exceeds the first on a close basis, it is simply uptrend continuation — the double top "never happened".

Measuring the Target

The traditional downside target on completion:

Formula

Target = neckline-break price − (peak's high − neckline)

Project the vertical distance from the peak's high to the neckline downward from the break point. For a double bottom, project it upward.

Example: peak high ¥3,100, neckline ¥3,000 → vertical distance ¥100. On breaking ¥3,000, the target is ¥2,900.

A guideline only. After the neckline break a "retest" (a pullback toward the neckline) often occurs — that level (old support = new resistance) is an excellent rally-sell point.

✦ Market Psychology

A double top captures the psychological impact of "the second attempt failing".

Some people thought "maybe this is the top" at the first peak. But the rally from the pullback made others re-buy ("guess it's still going up") — they build the second peak. Then that second peak stalls without exceeding the first.

At that moment, those who bought the second peak are confronted with the fact: "the top has been tested twice and rejected twice". A sense of resignation — "this isn't going higher" — spreads. They turn to dumping, dragging in the stops of those who bought near the neckline, and the neckline break accelerates.

"One failure" might be coincidence. "Two consecutive failures at the same place" convinces participants: "this isn't coincidence — it really is the top". A double top is the record of that conviction forming.

How to Use It

Short entry on a double top

After an uptrend, two roughly equal peaks line up
Confirm the second peak failed to exceed the first on a close basis
Wait for a clear close-basis break of the neckline (the trough between the peaks)
Enter just after the break, or wait for the retest for a better price
Stop just above the peaks' high (above that, the pattern is invalidated)
First target the calculated value; second target the next major support

Long entry on a double bottom

Invert all of the above. After a downtrend, two roughly equal troughs, the second not breaking the first on a close basis, and a close-basis break above the neckline → buy.

Schematic of a Double Top and a Double Bottom — Left: an M at a top — two peaks test the same high and fail, and the neckline break confirms the reversal. Right: a W at a bottom — two troughs are absorbed at the same low, and the neckline break upward confirms the turn. The failed second attempt drives the move.View OANDA:USDJPY live →

Chart Example

A double top at a high and a double bottom at a low — Left: double top (M). The second peak fails to exceed the first; the neckline break confirms the reversal. Right: double bottom (W), symmetric at the bottom.

Limitations

Worthless before completion: just an "M-ish shape" until the neckline break
Many fakeouts: a famous pattern is a stop-hunt target
Sometimes ambiguous vs. a head and shoulders: a small peak in the middle blurs the line
The target is a guideline: not guaranteed to reach or stop there

Head and Shoulders: a more complex three-peak reversal
Support & Resistance: two peaks are two tests of the same resistance
Dow Theory: "failure to make a new high" is the reversal signal

Related Studies

← Patterns

Intermediate5 min2026-05-13Open

Double Top & Bottom

Two peaks, two troughs. The simplest reversal pattern, marking 'the failure of the second attempt'. Neckline, target, and the moment the M or W completes.

Double TopDouble BottomReversalNecklineChart Pattern

Overview

A double top (an "M top") forms two roughly equal peaks at the top of an uptrend, then reverses. On the chart it looks like the letter "M".

A double bottom (a "W bottom") is the inverse — two roughly equal troughs at the bottom of a downtrend, then a reversal. It looks like a "W".

The Structure (a Top)

First peak (left peak): a high within the uptrend, then a pullback (just a pullback so far)
Trough (neckline level): the pullback low — this later becomes the "neckline"
Second peak (right peak): another rally reaching roughly the first peak's height — but failing to exceed it. In Dow Theory terms, the failure to make a new high. Buyers have lost the strength to push another leg higher.
Neckline break: the decline from the second peak clearly breaks below the trough (the neckline) on a close basis → the double top completes, the reversal is confirmed.

The neckline

The trough between the two peaks. Usually roughly horizontal.

Measuring the Target

The traditional downside target on completion:

Formula

Target = neckline-break price − (peak's high − neckline)

Project the vertical distance from the peak's high to the neckline downward from the break point. For a double bottom, project it upward.

Example: peak high ¥3,100, neckline ¥3,000 → vertical distance ¥100. On breaking ¥3,000, the target is ¥2,900.

A guideline only. After the neckline break a "retest" (a pullback toward the neckline) often occurs — that level (old support = new resistance) is an excellent rally-sell point.

✦ Market Psychology

A double top captures the psychological impact of "the second attempt failing".

How to Use It

Short entry on a double top

After an uptrend, two roughly equal peaks line up
Confirm the second peak failed to exceed the first on a close basis
Wait for a clear close-basis break of the neckline (the trough between the peaks)
Enter just after the break, or wait for the retest for a better price
Stop just above the peaks' high (above that, the pattern is invalidated)
First target the calculated value; second target the next major support

Long entry on a double bottom

Invert all of the above. After a downtrend, two roughly equal troughs, the second not breaking the first on a close basis, and a close-basis break above the neckline → buy.

Chart Example

Limitations

Worthless before completion: just an "M-ish shape" until the neckline break
Many fakeouts: a famous pattern is a stop-hunt target
Sometimes ambiguous vs. a head and shoulders: a small peak in the middle blurs the line
The target is a guideline: not guaranteed to reach or stop there

Head and Shoulders: a more complex three-peak reversal
Support & Resistance: two peaks are two tests of the same resistance
Dow Theory: "failure to make a new high" is the reversal signal

Related Studies