A double bottom is a bullish reversal chart pattern that looks like the letter W. Price falls to a low, bounces, falls again to a similar low, then rises through the midpoint peak between those lows. It is the mirror of a double top, and like most patterns it is a description of failed selling pressure — not a promise of a new bull market.
The shape in plain English
The first low marks a point where buyers stepped in. The bounce creates a swing high (sometimes called the neckline area). The second low shows sellers trying again near the same price and failing to push much further. When price then breaks above the intervening high, many traders read that as evidence that supply at the lows has been absorbed.
The two lows need not be identical to the pip. Close proximity on the same timeframe is enough. A second low that undercuts the first by a little and then recovers can still count; a deep breakdown that keeps falling is simply a downtrend continuing.
Confirmation and invalidation
Waiting for a close above the neckline area reduces the number of false Ws. Some traders want rising volume on the break; others use a retest of the broken level as support. Invalidation is usually a decisive break below the second low after you have acted — the idea that sellers were exhausted is then wrong.
Context still rules. A double bottom into major support after a long decline is more interesting than the same shape halfway through a three-day range. Pairing it with candle clues such as an evening star on a higher timeframe would be odd for a bullish pattern — use bullish candles and structure instead.
Common mistakes
- Buying the second touch before any strength appears.
- Ignoring the stop distance from entry to below the lows; wide patterns need smaller size.
- Assuming measured-move targets always pay; targets are planning tools, not obligations.
- Spotting Ws everywhere on low timeframes where noise dominates.
Measured moves and expectations
Classical technicians sometimes project a target by taking the height from the lows to the neckline and adding it above the breakout. Treat that as a planning yardstick for scaling out, not as a destiny. Markets do not owe you a symmetric move. Partial profits into strength and a trailed invalidation often beat all-or-nothing target faith.
Time also matters. A W that forms over months on a weekly chart is a different animal from a W that forms in two hours on a one-minute chart. Match the pattern’s timeframe to your holding period.
Failed double bottoms
When price breaks the neckline and then collapses back below the lows, the bullish story is wrong. That failure can itself become a bearish continuation signal for traders on the other side. Journal failures as carefully as successes; otherwise availability bias will make the textbook winners feel like the base rate.
Volume and retests
Rising volume on the neckline break helps some playbooks; quiet breaks can still work in institutional markets where volume hides off-exchange. A retest of the broken neckline that holds as support is often a cleaner second chance than chasing the first spike. If the retest fails and price falls back into the W, stand down — the pattern has not earned further risk.
Combine with higher-timeframe trend filters. Buying every W in a weekly downtrend is a different business from buying W completions after a long decline into weekly support. State which business you are in before you click.
Bringing it together
A double bottom sketches two failed attempts to push price lower, followed by a break of the middle peak. It earns attention when location and confirmation align; it wastes capital when forced onto every wiggle. The second-order point is always the same: the pattern suggests a story about supply; your size and invalidation decide whether that story is worth the risk.
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