Double Bottoms, Adam & Adam

Core idea

An Adam & Adam double bottom is a twin-valley reversal pattern where both bottoms are narrow, V-shaped, often single-day price spikes that touch the ground near the same price. The "person on stilts" mental image — narrow legs, sharp bottoms — captures the Adam shape. The pattern is the first of four double-bottom variants Bulkowski catalogues. The other three (Adam & Eve, Eve & Adam, Eve & Eve) substitute one or both bottoms with the wider, rounded Eve shape.

Performance ranks in the bottom half — Adam & Adam underperforms the Eve & Eve "classic" version meaningfully — but it's still a 1,295-pattern bull-market dataset with a confirmation rule that, if followed, weeds out roughly half the would-be trades that would have failed.

Bulkowski's framing: "A twin bottom pattern is not a valid double bottom until price closes above the high between the two bottoms. Always wait for confirmation before taking a position in a stock because price continues down 48% of the time."

Why it matters

The double bottom is the most widely recognized reversal pattern on every trading website, every TA textbook, every chart-pattern course. But what most beginners miss is that twin bottoms and double bottoms are not the same thing. A pair of valleys at the same price level is a twin bottom; only when price closes above the peak between them does it become a confirmed double bottom — and 48% of twin bottoms never confirm. That single discipline (wait for the confirmation close) cuts the failure rate roughly in half.

The Adam & Eve distinction (Double Bottoms, Adam & Adam through Double Bottoms, Eve & Eve) is Bulkowski's contribution to the literature: he showed that bottom shape — not just bottom position — predicts performance. The narrowest version (Adam & Adam) is the weakest; the widest (Eve & Eve) is the strongest. The two mixed variants sit in between.

Why the narrow shape underperforms

Adam bottoms are usually one- or two-day price spikes — sharp emotional capitulations. The buying response is fast but thin. By contrast, Eve bottoms are rounded multi-week accumulation areas where buyers build positions deliberately. A double bottom built from two emotional spikes (Adam & Adam) lacks the structural accumulation that Eve bottoms supply. Result: the reversal happens, but the trend behind it is weaker.

Key takeaways

Mental model

Copy sourceZoom

Practical application

Example

A small-cap tech stock declines from $24 to $14 over three months. On day 65, it spikes down intraday to $13.20 then closes at $14.10 — a one-day Adam bottom. Volume is heavy. Over the next 15 days, the stock rallies to $16.80 (the peak between bottoms), then sells off again to $13.40 on day 81 — another single-day spike, very similar to the first.

The trader does not buy yet. The confirmation line is $16.80. Over the next nine days, the stock recovers to $16.40 — close, but no confirmation. On day 92, the stock gaps up and closes at $17.20 on twice average volume. Confirmed.

The trader buys at $17.20, stop at $13.10 (just below the lower of the two bottoms). Six trading days later the stock pulls back to $16.40 — a textbook throwback. The trader holds. Over the next four months the stock rises to $21.50, a 25% gain — slightly above the median Adam & Adam result.

Had the trader bought the right bottom at $13.40 instead of waiting for $17.20, the entry would have been $3.80 better. But the trader would have spent two weeks watching the pattern fail to confirm in roughly half of cases like this — and the average outcome of "buy the right bottom" trades across Bulkowski's dataset is worse than "wait for confirmation," because the failed-confirmation trades drag down the mean.

Related lessons