Upside Gap Two Crows (CDLUPSIDEGAP2CROWS)

Summary

A three-candle bearish reversal pattern: a long white candle, then a small black candle gapping up (a gap between the real bodies), then a black candle that engulfs the second candle's real body but still closes above the first candle's close. Signals a bearish reversal. A hit (-100) is a bearish reversal signal, most meaningful in an uptrend.

Notes

The pattern classically assumes a prior uptrend, but this function does not verify any trend.
Although classically a bearish reversal, Bulkowski's testing found this actually acts as a bullish continuation 60% of the time, and even when it does work "the price move is often lousy." (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 pattern bar, 0 otherwise. Bearish-only: this pattern never emits +100

Output Values

Value	Meaning
-100	Upside Gap Two Crows pattern detected: bearish
0	No pattern

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: cdlupsidegap2crows.c · cdlupsidegap2crows.yaml

Native	File
C	`ta_CDLUPSIDEGAP2CROWS.c`
Rust	`cdlupsidegap2crows.rs`
Java	`Core_CDLUPSIDEGAP2CROWS.java`

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

Aliases

Upside Gap Two Crows