Candlestick formation · Bullish
What is it, in one line
A green candle opening at the prior red open, in an uptrend.
Bullish · 2 candles · verdict: rule and thresholds below
A green candle opening at the prior red open, in an uptrend. 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
Two candles with the same open, in opposite directions, during a rise. The second opens exactly where the first did and never trades below it — the pullback is erased at the open.
The traditional claim
Traditionally read as a continuation: the market rejected the previous session entirely.
How this detection is wrong
The matching opens are the pattern. The second candle is also a belt hold, so the two overlap by construction.
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 |
| matchTolAtr | how closely two levels must match, in ATR | 0.05 |
| maxLowerPct | lower wick, at most, as a share of the range | 0.05 |
| minBodyAtr | body, at least, in ATR | 0.4 |
| 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.
Two candles with the same open, in opposite directions, during a rise. The second opens exactly where the first did and never trades below it — the pullback is erased at the open. 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: the market rejected the previous session entirely.
The matching opens are the pattern. The second candle is also a belt hold, so the two overlap by construction.
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 above 1, how closely two levels must match, in ATR 0.05 — 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 Separating Lines: An up candle in a downtrend, then a down candle opening at the same price.