Upside/Downside Gap Three Methods (CDLXSIDEGAP3METHODS)

Summary

A three-candle continuation pattern: two same-color candles separated by a real-body gap, followed by an opposite-color candle that fills into the gap. Bullish (upside) when the first two candles are white, bearish (downside) when they are black.

Notes

This continuation pattern does not verify the prior trend it classically assumes; the caller must confirm the trend.
Bulkowski's testing found BOTH directions of this pattern actually act as reversals more often than not, opposite the classic continuation label: the upside variant reverses bearish 59% of the time, the downside variant reverses bullish 62% of the time. (thepatternsite.com)

Inputs

inOpen — Open price of each bar
inHigh — High price of each bar
inLow — Low price of each bar
inClose — Close price of each bar

Outputs

outInteger — +100 when the two same-color candles are white (bullish/upside continuation), -100 when black (bearish/downside continuation), 0 otherwise. Equals candlecolor(1st candle) * 100

Output Values

Value	Meaning
-100	Downside Gap Three Methods: the first two candles are black — bearish continuation
0	No pattern
100	Upside Gap Three Methods: the first two candles are white — bullish continuation

Properties

Numerical Stability: Start-Independent


☐ Overlap Input
✅ Independent Y-Axis i
✅ Candlestick i
☐ Can Output NaN or ±Inf
☐ Identity at Period 1

Implementation

TA-Lib Definition: cdlxsidegap3methods.c · cdlxsidegap3methods.yaml

Native	File
C	`ta_CDLXSIDEGAP3METHODS.c`
Rust	`cdlxsidegap3methods.rs`
Java	`Core_CDLXSIDEGAP3METHODS.java`

TA-Lib is also available for Python, R and more using a wrapper.

Aliases

Upside/Downside Gap Three Methods, Upside Gap Three Methods, Downside Gap Three Methods