Counterattack (CDLCOUNTERATTACK)

Summary

A two-candle pattern of two long, opposite-colored real bodies whose closing prices are (nearly) equal. Emits a bullish signal when the second candle is white and a bearish signal when it is black (a reversal signal, though its trend context is not checked).

Notes

Does not verify the prior trend the reversal signal classically assumes.
Bulkowski's testing found the bearish Counterattack/Meeting Lines does not reliably reverse at all — it acts as a bullish CONTINUATION 51% of the time — and the bullish version reverses only 56% of the time, both "near random" by his classification. (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 second candle is white (bullish), -100 when it is black (bearish), 0 when no pattern

Output Values

Value	Meaning
-100	Bearish Counterattack — a strong rally is matched and stopped cold by an equally strong opposite close, a reversal warning at a top
0	No pattern
100	Bullish Counterattack — a strong decline is matched and stopped cold by an equally strong opposite close, a reversal warning at a bottom

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: cdlcounterattack.c · cdlcounterattack.yaml

Native	File
C	`ta_CDLCOUNTERATTACK.c`
Rust	`cdlcounterattack.rs`
Java	`Core_CDLCOUNTERATTACK.java`

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

Aliases

Counterattack, Counterattack Lines, Meeting Lines