Candlestick formation · Bullish
What is it, in one line
Three green closes, then one red candle covering all three.
Bullish · 4 candles · verdict: rule and thresholds below
Three green closes, then one red candle covering all three. The engine checks the formation as an executable condition over open, high, low and close, with a trend filter applied before the count is kept.
Method
Four candles: three consecutive up candles each closing higher, then a down candle that opens above the third close and closes below the first candle’s open — undoing the whole advance in one session.
The traditional claim
Traditionally read as a continuation rather than a reversal, which is counter-intuitive enough to be worth testing: the wipeout is treated as a shakeout inside an ongoing uptrend.
How this detection is wrong
The fourth candle must close below the first candle’s open. Anything less and this is three up candles followed by a down candle, which is not a pattern.
Published so the count can be reproduced. Every figure below is a parameter of the rule, not a preference: change one and the occurrence count changes with it.
| Parameter | Meaning | Default |
|---|---|---|
| trendPeriod | bars of prior trend inspected | 5 |
| minPriorSlope | prior slope must be above | 1 |
| minBodyAtr | body, at least, in ATR | 0.3 |
| atrPeriod | bars of ATR used to size everything below | 14 |
These share enough geometry that a detector can return more than one of them on the same bar. The engine reports every match rather than picking a winner.
Every pair on the site that can be mistaken for another, and what separates each: the look-alikes index.
Four candles: three consecutive up candles each closing higher, then a down candle that opens above the third close and closes below the first candle’s open — undoing the whole advance in one session. The detector also requires a prior uptrend, so the same shape in the wrong context is not counted.
It is read as bullish. Traditionally read as a continuation rather than a reversal, which is counter-intuitive enough to be worth testing: the wipeout is treated as a shakeout inside an ongoing uptrend.
The fourth candle must close below the first candle’s open. Anything less and this is three up candles followed by a down candle, which is not a pattern.
As an executable rule over open, high, low and close, with 4 named parameters — including bars of prior trend inspected 5, prior slope must be above 1, body, at least, in ATR 0.3 — all published on this page so the count can be reproduced. Strict and loose variants are defined as well, so the sensitivity of the count to those thresholds is visible rather than assumed.
Measurement pending re-run
No hit rate is published here yet. The run that would supply one was computed on engine ca6d9e36c81c; the engine is now cfb08765de7c. Its candlestick rows included the still-forming bar, and it predates the chart formations entirely, so those figures have been withdrawn rather than published with a caveat. The definition above is unaffected: it is what the detector tests, and no re-run changes it.
Same shape, opposite reading
The shapes are close, and the prior trend is what decides which one fired: this rule requires a preceding uptrend, its mirror a preceding downtrend.
Bearish Three-Line Strike: Three falling candles, then one up candle that erases all three.