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Tiếng ViệtWhat Is a Double Bottom Pattern? How to Trade It in Crypto
by PrivaccUpdated September 25, 20268 min read
A double bottom is a bullish reversal pattern: price falls to a low, bounces, falls back to roughly the same low, holds, and then rises through the high between the two lows. On a chart it looks like the letter W. This guide covers how to identify one, why it is not a double bottom until the neckline breaks, how traders plan around it, and the ways it fails.
On this page
- What is a double bottom pattern?
- The anatomy of a double bottom
- How to identify a double bottom
- What the pattern says about buyers and sellers
- How to trade a double bottom
- Three ways traders approach it
- Double bottom vs double top
- Double bottom vs related patterns
- How reliable is the double bottom?
- When a double bottom fails
- Double bottoms in crypto: what is different
- A worked example
- Common mistakes
- Practise on a live chart
- Pros and cons of the double bottom
What is a double bottom pattern?
A double bottom forms when price falls to a low, bounces to a resistance level, falls back to about the same low, and holds there a second time. When price then closes above that resistance — the neckline — the pattern is complete.
It is a reversal pattern. Two failed attempts to push below the same price suggest sellers have run out of strength there, and the break of the neckline is the evidence that buyers have taken over.
The anatomy of a double bottom
Four parts, each carrying information.
The prior downtrend
There has to be a decline to reverse. Two equal lows in a sideways market are just the bottom of a range.
The first low
Price makes a low and bounces. On its own this is ordinary — every decline has bounces.
The neckline
The high of the bounce between the two lows. It matters most, because the pattern is not confirmed until price closes above it.
The second low
Price returns to roughly the first low and holds again. The lows need not be identical — close is enough — but a second low well below the first is a new low, not a double bottom.
How to identify a double bottom
The shape is easy to see — and easy to see too early.
Wait for the neckline
Buying the second low because it 'looks like a double bottom' is the commonest mistake. Until price closes above the neckline there is no pattern, and many possible double bottoms simply go on to make a lower low.
Look for similar lows
The closer the two lows are in price, the clearer the message that sellers failed at the same level twice.
Allow time between them
Two lows a couple of candles apart are noise. A meaningful double bottom has a proper bounce and decline between them.
Watch volume
Selling volume is often lighter on the second low than the first, and buying volume heavier on the break of the neckline.
What the pattern says about buyers and sellers
At the first low, sellers push price down to a level where buyers outweigh them. On the bounce, sellers return and drive a second decline. When that decline stalls at the same level, it shows the same buyers are still there — and when price breaks above the neckline, sellers who sold on the bounce are wrong-footed, and some of them buy back too.
How to trade a double bottom
The value is a plan made in advance: where to act, where the idea is wrong, and a rough objective. Nothing in this guide is financial advice.
Entry
The usual trigger is a candle close above the neckline. Buying earlier is buying a guess.
Stop
The stop commonly goes just below the two lows. If price falls through them, the pattern has failed and the decline has resumed.
Target
The conventional objective is the height from the lows to the neckline, added to the neckline. With lows at 110 and a neckline at 134, the height is 24 and the target 158. It is a rule of thumb, not a forecast.
Size
A stop below the lows can be far from the entry, so size the position so that being wrong costs an amount you accept.
Three ways traders approach it
As always, the trade-off is price against confirmation.
1. Buy the neckline break
Act on a close above the neckline with a stop below the lows. The standard, confirmed approach.
2. Buy the retest
After the break, price often dips back to the neckline, which may now act as support. Waiting for it confirms more and gives a better price — if it comes.
3. Buy near the second low
The aggressive approach buys near the second low with a tight stop below it. Better price, but no confirmation the pattern will complete.
Double bottom vs double top
The double top is the mirror image: two equal highs with a trough between, confirmed by a break down through the trough. A double bottom marks sellers failing twice at a low; a double top marks buyers failing twice at a high.
Double bottom vs related patterns
Several bullish reversal patterns share the idea of repeated support followed by a break of resistance.
| Double bottom | Triple bottom | Cup and handle | |
|---|---|---|---|
| Base | Two distinct lows | Three distinct lows | One rounded base |
| Confirmed by | Close above the neckline | Close above the neckline | Close above the rim |
| Usual reading | Bullish reversal | Bullish reversal | Bullish, often continuation |
| Common target | Pattern height above the neckline | Pattern height above the neckline | Cup depth above the rim |
How reliable is the double bottom?
Once confirmed, it is a well-regarded reversal signal; before confirmation, it is not a signal. Published success rates depend on market, timeframe and definition, and do not carry over to thin tokens.
Where it tends to work better
After an extended decline, with clearly similar lows, lighter selling on the second low, and a decisive neckline break on volume.
Where it tends to work worse
In sideways markets, on very short timeframes, on thin tokens, and when the break comes on weak volume.
When a double bottom fails
It fails when price is turned back at the neckline and then falls through both lows. What looked like a floor gave way, and the fall that follows can be sharp as buyers who expected a reversal sell together.
It can also fail just after confirmation: a close above the neckline that slips back below within a few candles.
Double bottoms in crypto: what is different
A few crypto-specific points.
Wicks undershoot lows
Thin order books produce long lower wicks that dip below a previous low and recover. Judging the lows on closes avoids mistaking a wick for a new low.
Capitulation lows
Crypto sell-offs often end with a sharp, high-volume flush. A first low like that, followed by a quieter retest, is a common shape of double bottom.
Liquidity decides meaning
On a deep market the pattern reflects many participants; on a small token it may reflect a few wallets, and means much less.
News overrides it
An exploit or delisting can send price through both lows in minutes. The stop exists for that.
A worked example
A token falls from 1.50 to 1.00, bounces to 1.18, falls again to 1.01 and turns up. The neckline is at 1.18 and the pattern's height 1.18 − 1.00 = 0.18.
Confirmation is a close above 1.18. A trader following the conventional plan acts on that close, places a stop just below the lows at around 0.97, and sets an objective of 1.18 + 0.18 = 1.36. The risk from about 1.18 to 0.97 is 0.21 — larger than many expect, because the stop sits beneath the whole pattern — against a potential 0.18.
On those numbers the set-up is not attractive, however clean the W looks. Doing that sum before acting is the most useful habit the pattern can teach.
Common mistakes
The errors that turn a sound pattern into a losing trade.
Buying the second low
The second low is only a second low in hindsight. Until the neckline breaks, it may just as easily be one step on the way to a third, lower low.
Ignoring a lower second low
A second low clearly beneath the first is a new low in a downtrend, not a double bottom, however W-shaped the chart looks.
Forgetting the stop distance
Because the stop sits below both lows, it is often far from the entry. The pattern can be valid and the trade still not worth taking.
Reading a W inside a range
Two equal lows in a sideways market are the floor of a range. The pattern needs a decline before it to reverse.
Practise on a live chart
Look for two similar lows with a real bounce between them, and notice how often the neckline turns price back. The chart below is live, from on-chain trades in your browser.
Pros and cons of the double bottom
Useful, with a discipline attached.
Pros
A clear confirmation level, a logical stop and a defined objective, recognisable on any timeframe.
Cons
Very often bought too early, a stop that can be distant, neckline breaks that can reverse, and a target that is a convention rather than a forecast.
Frequently asked questions
Is a double bottom bullish?
Yes. It is a bullish reversal pattern suggesting a downtrend is ending — but only once price closes above the neckline.
When is a double bottom confirmed?
When price closes above the neckline, the high between the two lows. Before that it is only a possible pattern.
Do the two lows have to be exactly equal?
No, only close. A second low well below the first is a new low rather than a double bottom.
How do you calculate the target?
Measure from the lows up to the neckline and add that distance to the neckline. Lows at 110 and a neckline at 134 give a target of 158. It is a rule of thumb.
Where do traders put the stop?
Usually just below the two lows. If price falls through them, the pattern has failed.
What is the difference between a double bottom and a W pattern?
They are the same thing. 'W pattern' describes the shape the two lows and the peak between them make on a chart.
Is a double bottom the same as a cup and handle?
No. A double bottom has two distinct lows; a cup and handle has one rounded base followed by a small handle. Both are read as bullish once they break resistance.
Does the double bottom work in crypto?
It appears on crypto charts as anywhere, but long wicks and thin liquidity make it less dependable on small tokens than on deep markets.