Double Bottom Pattern: Bullish Reversal

A double bottom is a bullish reversal pattern made of two roughly equal troughs separated by a peak, tracing the shape of the letter W. It forms after a downtrend, and when price closes above the neckline (the high between the troughs), it signals that the decline may be reversing into an advance.

What is a double bottom pattern?

A double bottom is a reversal pattern that appears at the end of a downtrend, made of two troughs at a similar price level with a moderate bounce in between. The shape resembles the letter W, and it signals that sellers tried twice to push lower and failed, hinting that momentum is shifting toward buyers.

The pattern sits in the family of reversal setups described in our guide to chart patterns. The two failed attempts at the same support are the core message: a level price could not break. To read the highs and lows precisely, it helps to be comfortable with support and resistance first.

What are the parts of a double bottom?

A double bottom has three components: two troughs, a peak between them, and a neckline. The troughs should be at a similar level, and the neckline is the resistance that, when broken, confirms the reversal.

• First trough. Price falls to a low within the downtrend, then bounces to a reaction high.
• Second trough. Price declines again to roughly the same low but fails to break below it, signaling that sellers are losing control.
• Neckline. The resistance level drawn through the peak between the two troughs. A close above it confirms the pattern.

How is a double bottom confirmed?

A double bottom is confirmed when price closes above the neckline, the resistance level at the peak between the two troughs. Until that break occurs, the shape is only a developing possibility, and price could just as easily fail at resistance and resume its downtrend.

A decisive close above the neckline, ideally on rising volume, is what technical analysts treat as confirmation. After the breakout, the old neckline resistance often flips into support, and price sometimes pulls back to test it from above before continuing higher. This throwback can offer a clearer entry and a defined level to place a stop below.

How do you measure the price target?

The double bottom target is measured by taking the height from the troughs up to the neckline, then adding that distance to the neckline at the breakout point. The result is a rough projection of how far the advance might run.

For example, if the troughs sit near 11 and the neckline at 16, the pattern height is 5. Adding 5 to a neckline break at 16 gives a target near 21. As with any measured move, this is a guide rather than a guarantee. Previous resistance levels, moving averages, and the broader trend should be weighed alongside it rather than relying on the projection alone.

What does volume tell you?

Volume helps gauge whether the reversal has conviction. In a textbook double bottom, the second trough often forms on lighter volume than the first, hinting that selling pressure is drying up. The decisive cue comes on the neckline break, where strong volume supports the move.

A breakout above the neckline accompanied by expanding volume lends credibility to the reversal, while a break on thin volume is more prone to fail. Volume is not a strict requirement, but a confirmed breakout supported by rising participation is the stronger version of the setup, signaling that buyers are stepping in with real conviction.

Double bottom vs double top

The double bottom and the double top are mirror images. A double bottom is bullish, forms after a downtrend with two troughs (a W), and confirms on a break above the neckline. A double top is bearish, forms after an uptrend with two peaks (an M), and confirms on a break below the neckline.

Identifying which pattern you are looking at is essential, because the entry direction and the role of the neckline reverse between the two.

Putting the double bottom in context

The double bottom is a structured way to spot when a downtrend may be failing at a level price has already defended once. Its value comes from a disciplined checklist: two clear, roughly equal troughs, a defined neckline, a confirmed close above it, supportive volume, and a measured target treated as a rough guide.

If you are still learning to spot reversals, study the inverse head and shoulders and ground yourself in support and resistance first. Bullynx can also read a chart screenshot and point out where a potential double bottom sits relative to the neckline and the prevailing trend.