What a double bottom is
A double bottom is a chart pattern where price falls to a low, bounces, falls back to roughly the same low, and then rises again. On the chart it looks like the letter W. Traders read it as a possible end of a decline, because sellers failed to push price below the same area twice.
It belongs to the family of reversal chart patterns. Its mirror image is the double top. If price tests the same low three times instead, the pattern becomes a triple bottom.
A pattern describes past price behaviour. It does not tell you what price will do next.
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The structure, drawn
The example below is drawn by hand. It has no prices and no real instrument behind it.
The parts:
- Prior decline: price was falling before the pattern began. Without a decline there is nothing to reverse.
- Left low: the earlier swing low.
- Neckline: a horizontal line drawn through the highest point of the bounce between the lows.
- Right low: the later swing low, close to the level of the left low.
- Breakout: a close above the neckline. Until that happens, the pattern is not confirmed.
Identification rules
Many traders apply a checklist like this one before calling a structure a double bottom chart pattern:
| Rule | What to check |
|---|---|
| Prior trend | A visible decline leads into the left low |
| Similar lows | The lows sit in the same price zone, not at an exact price |
| Clear bounce | The rally between the lows is large enough to stand out on the chart |
| Spacing | The lows are separated by a reasonable number of candles, not squeezed together |
| Confirmation | A candle closes above the neckline |
| Participation | Volume (or tick volume in forex) often rises on the breakout |
A few details for experienced traders:
- The right low can sit slightly above or slightly below the left low. A shallow undercut that quickly recovers is common and often still counted as a double bottom.
- On spot forex there is no central exchange volume. Platforms like MT4 and MT5 show tick volume, which counts price changes, not traded size. Treat it as a rough guide only.
- Timeframe matters. A W on a short intraday chart carries less weight than one on daily candles, because small swings form and break all the time.
For candle-level detail at each low, see candlestick patterns.
The measured-move convention
The classic double bottom strategy in textbooks uses a measured move. It works like this:
- Measure the vertical distance from the lows to the neckline.
- Add that distance to the neckline at the breakout point.
- The resulting level is the pattern's "measured objective".
This is a drawing convention, not a forecast. Price may stop well short of it, pass far beyond it, or reverse straight after the breakout. Traders use the objective mainly to compare possible reward with the distance to their invalidation level. You can work out position size for a given stop distance with the tools on the calculators page.
Invalidation
A pattern needs a point where it is clearly wrong. For a double bottom, the usual invalidation points are:
- A close below both lows. The support zone has failed and the W structure no longer exists.
- A failed breakout. Price closes above the neckline, then falls back below it and keeps going down.
- No breakout at all. Price drifts sideways under the neckline for a long time. The setup loses meaning and may turn into a rectangle.
Defining invalidation before acting is part of risk management. Leveraged forex and CFD trading can lose money fast, and a pattern that looked clean can fail within minutes around news.
Common false breakouts and failure modes
Failure is normal for chart patterns. The frequent cases:
- Breakout on a wick only. Price spikes above the neckline but closes below it. Many traders wait for a candle close for this reason.
- News-driven moves. Central bank decisions and data releases can push price through the neckline and back. A double bottom in forex is especially exposed to this around scheduled events.
- Strong downtrend context. In a steep decline on higher timeframes, a W on a lower timeframe is often just a pause before the next leg down.
- Retest that breaks. After a breakout, price often returns to the old neckline. Sometimes it holds; sometimes it slices back into the pattern.
- Forced patterns. Seeing a W in every pair of lows. If you need to stretch the rules, the structure is probably not there.
Practising identification on a demo account lets you review how these structures behave without putting money at risk. More context on support, resistance and confirmation is on the technical analysis page.
Frequent questions
Do the lows have to be at exactly the same price?
No. They should sit in the same zone. Small differences are normal, especially on volatile instruments.
When is a double bottom confirmed?
Under the usual definition, when a candle closes above the neckline. Before that, it is only a possible pattern.
Is the measured-move target a price prediction?
No. It is a convention for estimating scale. Price often does not reach it, and sometimes goes much further.
Does the double bottom pattern work the same in forex, gold and indices?
The drawing rules are the same. Behaviour differs with volatility, trading hours and news exposure, so test it on each instrument separately.
What is the difference between a double bottom and a rounding bottom?
A double bottom has distinct lows with a clear bounce between them. A rounding bottom forms a gradual curve with no sharp swing in the middle.