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Home / Technical Analysis / Candlestick patterns / Three Outside Up

Candlestick formation · Bullish

Three Outside Up

What is it, in one line

A bullish engulfing confirmed by a third green close.

Bullish · 3 candles · verdict: rule and thresholds below

Bullish 3 candles Traditional claim
Three Outside Up — 13 price bars ending on the bar where the Three Outside Up completes. The last 3 bars are the formation, shaded; the bars before them are the prior context the rule requires.
Verified example · fires the Three Outside Up rule · not a schematic

What has to be true

A bullish engulfing confirmed by a third green close. 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.

candles = 3 candles
direction = Bullish
trend filter = prior decline
forward window = 10 bars

Method

What the engine tests

A bullish engulfing followed by a third up candle closing above the second candle’s close — the engulfing plus its confirmation.

Family
Candlestick
Bars
3 bars
Direction
Bullish
Class
Reversal
Prior context
Downtrend
TA-Lib
CDL3OUTSIDE

The traditional claim

Traditionally read as a confirmed engulfing, and often cited as one of the stronger three-candle formations.

How this detection is wrong

Contains a bullish engulfing by construction. The gap between the engulfing count and this count, on the same data, is the price of waiting for confirmation.

The thresholds the detector uses

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.

Detection parameters for the Three Outside Up
ParameterMeaningDefault
trendPeriodbars of prior trend inspected5
maxPriorSlopeprior slope must be below-1
minPriorBodyAtrthe preceding body, at least, in ATR0.3
atrPeriodbars of ATR used to size everything below14
strict
Tighter thresholds. Fewer detections, each a cleaner example.
maxPriorSlope -1.5 · minPriorBodyAtr 0.5
loose
Wider thresholds. More detections, more marginal ones.
maxPriorSlope -0.5 · minPriorBodyAtr 0.1
no-context
The prior-trend requirement removed, so the shape alone fires.
maxPriorSlope not applied

Easily mistaken for

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.

Common questions

What is a Three Outside Up candlestick pattern?

A bullish engulfing followed by a third up candle closing above the second candle’s close — the engulfing plus its confirmation. The detector also requires a prior downtrend, so the same shape in the wrong context is not counted.

Is the Three Outside Up bullish or bearish?

It is read as bullish. Traditionally read as a confirmed engulfing, and often cited as one of the stronger three-candle formations.

When is a Three Outside Up not a Three Outside Up?

Contains a bullish engulfing by construction. The gap between the engulfing count and this count, on the same data, is the price of waiting for confirmation.

How is a Three Outside Up detected?

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 below -1, the preceding 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

Three Outside Down

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.

Three Outside Down: A bearish engulfing, then a third candle closing below the second.

How this was measured →

Other 3-candle formations

All 107 →
Three Outside Down A bearish engulfing confirmed by a third red close.
Bullish Tri-Star Three consecutive dojis at the bottom of a decline.
Bearish Tri-Star Three consecutive dojis at the top of a rise.
Advance Block Three green bodies, each smaller than the last.

Size a trade on this setup before you take it.