Tasuki Gap (CDLTASUKIGAP)

Summary

A three-candle pattern: a real-body-gapping candle followed by an opposite-color candle that opens inside its body and closes back into the gap without filling it. An upside gap is a bullish continuation signal; a downside gap is a bearish continuation signal.

Notes

This continuation pattern does not verify the prior trend it classically assumes; the caller must confirm the trend.
Bulkowski's testing found the downside Tasuki Gap actually acts as a bullish REVERSAL 54% of the time — opposite its textbook bearish-continuation label — while the upside variant does continue as labeled, but only 57% of the time ("near random"). (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 on a bullish (upside-gap) tasuki gap, -100 on a bearish (downside-gap) tasuki gap, 0 otherwise. Sign equals the color of the gap candle i-1 (candlecolor(i-1)*100)

Output Values

Value	Meaning
-100	Bearish (downside-gap) Tasuki Gap
0	No pattern
100	Bullish (upside-gap) Tasuki Gap

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: cdltasukigap.c · cdltasukigap.yaml

Native	File
C	`ta_CDLTASUKIGAP.c`
Rust	`cdltasukigap.rs`
Java	`Core_CDLTASUKIGAP.java`

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

Aliases

Tasuki Gap, Upside/Downside Tasuki Gap