Candlestick formation · Bullish
What is it, in one line
A morning doji star with gaps on both sides of the doji.
Bullish · 3 candles · verdict: rule and thresholds below
A morning doji star with gaps on both sides of the doji. 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
Three candles: a long down candle, then a doji whose entire range sits below it, then an up candle whose entire range sits above the doji. The middle session is stranded — no price traded at its level either before or after.
The traditional claim
Traditionally treated as one of the rarest and strongest reversal formations, precisely because the double gap is so hard to produce.
How this detection is wrong
Both gaps are required and both are measured on the full range, not the bodies. Instruments that rarely gap will produce almost none of these, and that absence is a fact about the market rather than the definition.
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 |
| maxPriorSlope | prior slope must be below | -1 |
| minFirstBodyAtr | first body, at least, in ATR | 0.6 |
| maxDojiBodyPct | body small enough to count as a doji | 0.05 |
| minGapAtr | gap between bars, at least, in ATR | 0 |
| 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.
Three candles: a long down candle, then a doji whose entire range sits below it, then an up candle whose entire range sits above the doji. The middle session is stranded — no price traded at its level either before or after. The detector also requires a prior downtrend, so the same shape in the wrong context is not counted.
It is read as bullish. Traditionally treated as one of the rarest and strongest reversal formations, precisely because the double gap is so hard to produce.
Both gaps are required and both are measured on the full range, not the bodies. Instruments that rarely gap will produce almost none of these, and that absence is a fact about the market rather than the definition.
As an executable rule over open, high, low and close, with 6 named parameters — including bars of prior trend inspected 5, prior slope must be below -1, first body, at least, in ATR 0.6 — 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 downtrend, its mirror a preceding uptrend.
Bearish Abandoned Baby: A doji isolated by gaps on both sides, between an up candle and a down candle.