Double Bottom: Definition, How to Trade, and Example

What Is a Double Bottom?

A double bottom is a bullish reversal chart pattern that forms after a downtrend. Price declines to a support level, bounces to a resistance level (the peak), declines a second time to approximately the same support, and then rallies. The resulting shape looks like the letter W. The horizontal line at the peak between the two troughs is the pattern's trigger - its equivalent of a neckline.

The pattern captures a shift in the supply-demand balance. The first trough marks a level where buyers step in and absorb selling pressure. The bounce to the peak shows buyers temporarily in control. The second trough tests the same support, and when sellers fail again at that level, it confirms that the support is real and that the downtrend has exhausted itself. The break of the peak completes the reversal.

Double bottoms are found on all timeframes. On the daily chart, the two troughs are typically separated by two to eight weeks. Like all reversal patterns, a double bottom on a higher timeframe generally carries more significance than one on a five-minute chart.

How a Double Bottom Works

The first trough creates a visible support level on the chart. When price approaches that level a second time, the market asks the critical question: will sellers break through, or will buyers defend again? When the second decline holds at approximately the same price, the answer is clear - sellers have had two attempts and failed both times.

This double failure shifts sentiment. Buyers gain confidence, shorts cover, and the peak between the troughs becomes the last barrier to a confirmed reversal. Once price breaks above it, former resistance becomes support, and the rally gains momentum as sidelined buyers pile in.

The measured-move target is the vertical distance from the troughs to the peak, projected upward from the peak breakout. This represents a minimum expected move. In many cases, the rally extends further, particularly when the double bottom coincides with other bullish signals such as a positive divergence in momentum indicators.

How to Identify a Double Bottom

Two lows at a similar level do not automatically constitute a double bottom. Context and confirmation matter.

• A prior downtrend must precede the pattern - the double bottom is a reversal, so it needs a decline to reverse.
• Two distinct troughs at approximately the same price level. A gap of 1-3% between the troughs is acceptable.
• A clearly defined peak (bounce high) between the two troughs.
• Volume often increases on the second trough and especially on the breakout above the peak, reflecting renewed buying interest.
• Confirmation requires a close above the peak high, not merely an intraday wick.

How to Trade a Double Bottom

The standard entry is a long on a confirmed close above the peak resistance. Aggressive traders sometimes buy near the second trough, anticipating the pattern - but this is a higher-risk entry because the pattern has not yet confirmed.

The stop loss goes below the twin troughs. If price makes a new low below both troughs, the double bottom has failed and the downtrend is likely continuing.

The textbook target is the trough-to-peak distance, measured vertically and added to the peak. Traders often refine this with nearby resistance zones - prior swing highs, moving averages, or Fibonacci levels - as practical profit-taking points.

• Entry: long on a confirmed close above the peak resistance.
• Stop: just below the lower of the two troughs.
• Target: the trough-to-peak height projected up from the peak break.
• Confirmation: expanding volume on the breakout adds conviction; light volume warns of a possible fakeout.

Limitations and Pitfalls

Double bottoms fail roughly one-third of the time. The most frustrating failure mode is the peak fakeout: price breaks above the peak, triggers long entries, and then reverses lower - sometimes undercutting both troughs on the next leg. This bull trap is more common when the broader market is in a sustained bear phase and the double bottom is fighting a prevailing downtrend.

A common mistake is calling the pattern too early. The second trough is not meaningful until price rallies and breaks the peak. Buying near what appears to be the second trough, before the peak breaks, is anticipation rather than confirmation - and it often leads to losses when price continues lower.

The time between the troughs matters. If they are too close together (only a few bars apart), the pattern may be a minor pause rather than a genuine reversal. Conversely, if they are very far apart (many months), the market context may have changed enough that the first trough is no longer relevant as a reference level.

Example

A stock in a downtrend drops to $30 and bounces to $35 over three weeks. Four weeks later it declines to $30.50 - near the first trough but not below it - on significantly lighter selling volume. The stock then rallies and closes at $35.80, above the peak at $35, on heavy buying volume. The double bottom is confirmed.

The trough-to-peak distance is approximately $5 ($35 minus $30), so the measured-move target is about $40 ($35 plus $5). A long entry at $35.80 with a stop below the troughs at $29.50 gives approximately $6.30 of risk for a ~$4.20 target - about a 0.7:1 reward-to-risk at the textbook target. Some traders improve this by entering on a pullback to the $35 peak (now support) with a tighter stop, or by trailing a portion of their position past the measured target if the rally extends.

Bottom Line

The double bottom is one of the most intuitive bullish reversal patterns: price tries twice to break a support level and fails, then rallies through the peak between the troughs. That confirmed break signals a shift from bearish to bullish control. Traded with patience - waiting for the peak breakout rather than guessing on the second trough - the pattern offers clear trade mechanics. Just remember the ~34% failure rate and keep position sizes appropriate to the distance from entry to stop.