Double Top and Double Bottom: When the Second Test Means Something

A double top is two similar highs with a low in between, considered a reversal pattern once that low is broken. A double bottom is the mirror version. In practice, a second test of a level ends in a breakout more often than the textbooks suggest.

What it is

The pattern is simple: twice the market fails to break through a similar level. A break of the low between the highs is supposed to confirm it.

The difficulty is that without a break of the low, a “double top” is simply two tests of resistance, which could just as well come before an upside breakout.

How people use it

selling on a break of the low between the highs
selling at the second high, before confirmation
combining it with an RSI divergence

What the research and evidence say

Pattern statistics (e.g. Bulkowski) show that effectiveness depends on the definition and confirmation, and many double tops don't reach their targets. Trading the pattern without confirmation is in practice just trading resistance.

Weaknesses

identifying it before confirmation is guesswork
the second high may be the start of a breakout
“similar” highs is a fuzzy definition
it ignores what happened at each test

What order flow shows

Every test of a high leaves a trace in order flow. If buyers are less aggressive on the second test than on the first and sellers are absorbing the buying, that's real weakness. If buying is stronger and the offers in the book disappear, a breakout is more likely than a reversal. The shape on the chart is the same in both cases.

Indicators vs order flow

Every indicator and every pattern in this section is built from the same data: a candle's open, high, low, close and sometimes volume. They're derivatives of price, showing the effect rather than the cause. Order flow looks at what price is made of: who was buying and selling aggressively (delta), where limit orders were waiting (the order book) and at which prices the market accepted trade (the volume profile).

On CME futures this data is real and comes from one central market. Spot forex doesn't have it: platforms show tick volume, the number of price changes at a single provider.

To be fair: order flow isn't the Holy Grail. It takes learning, it can be noisy, big players hide some of their orders, and an edge only comes from a process and risk control. But it gives you information that simply isn't on a candlestick chart.

How to use it sensibly

distinguish a confirmed pattern from two tests of a level
compare what happened on the first and second tests
count the patterns that failed as well

Glossary: Support and resistance
Glossary: Absorption
Glossary: Exhaustion
Glossary: DOM (order book)
Atlas of biases: Confirmation bias
Atlas of biases: Cherry-picking
Order flow: Absorption on a real market: a round-number level
Also under the microscope: Candlestick patterns
Also under the microscope: Head and shoulders
Also under the microscope: Triangle patterns

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Frequently asked questions

What does a double top mean in the markets?

That price twice failed to break a similar level. The reversal signal only comes with a break of the low between the highs.

Is a double bottom a buy signal?

Only after confirmation, i.e. a break of the high between the lows. Before that it's two tests of support.

Educational content, not investment advice. No signals, entries, stops or position sizes.