Candlestick formation · Bullish
What is it, in one line
An up candle that opens exactly at its low, so it has no lower shadow.
Bullish · 1 candle · verdict: rule and thresholds below
An up candle that opens exactly at its low, so it has no lower shadow. 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
One candle. It closes above its open, and the open sits at or within a hair of the low, so there is no lower shadow. Unlike the full marubozu the upper shadow is unconstrained — buyers controlled the bar from the first tick, but did not necessarily hold the high into the close.
The traditional claim
Read as buying pressure present from the open, and generally quoted as the weaker sibling of the full marubozu.
How this detection is wrong
An exact open==low test is a statement about the instrument's tick size, not about the candle, so the shadow is measured as a fraction of the bar's range. Note the existing set already carries the CLOSING marubozu, which constrains the other end; this constrains the open, and the two are different formations.
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 |
|---|---|---|
| maxShadowPct | each wick, at most, as a share of the range | 0.02 |
| minBodyPct | body, at least, as a share of the range | 0.6 |
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.
What is a Bullish Opening Marubozu candlestick pattern?
One candle. It closes above its open, and the open sits at or within a hair of the low, so there is no lower shadow. Unlike the full marubozu the upper shadow is unconstrained — buyers controlled the bar from the first tick, but did not necessarily hold the high into the close.
Is the Bullish Opening Marubozu bullish or bearish?
It is read as bullish. Read as buying pressure present from the open, and generally quoted as the weaker sibling of the full marubozu.
When is a Bullish Opening Marubozu not a Bullish Opening Marubozu?
An exact open==low test is a statement about the instrument's tick size, not about the candle, so the shadow is measured as a fraction of the bar's range. Note the existing set already carries the CLOSING marubozu, which constrains the other end; this constrains the open, and the two are different formations.
How is a Bullish Opening Marubozu detected?
As an executable rule over open, high, low and close, with 2 named parameters — including each wick, at most, as a share of the range 0.02, body, at least, as a share of the range 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.
This formation has a mirror
Its mirror is the same construction inverted, read in the opposite direction. Everything the two rules test is the same except the sign, so the thresholds on this page apply equally to both — and a result measured for one says nothing about the other until the other is measured too.
Bearish Opening Marubozu: A down candle that opens exactly at its high, so it has no upper shadow.