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).

Chart

Reference data (CSV) · Chart (SVG)

Chart metadata i

Outputs

outInteger: pattern_bull_bear · zero · positive · negative

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)
Rare: a few years of one symbol's daily bars may show none. Bulkowski ranks the bullish form 72nd and the bearish 63rd of 103 patterns by how often they occur (bullish Meeting Lines, bearish Meeting Lines).

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

What candlestick values mean: Candlestick Outputs. The function's flags declare which values it can return: rW7.

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
☐ Display Shift


☐ Can Output NaN or ±Inf
☐ Identity at Period 1
☐ Uses Transcendental
☐ Input Must Be Positive

Example

#include <stdio.h>
#include <ta_libc.h>

int n = 252;
double open[252]; /* your data, oldest first */
double high[252]; /* your data, oldest first */
double low[252]; /* your data, oldest first */
double close[252]; /* your data, oldest first */
int out[252];
int outBegIdx, outNBElement;

TA_Initialize();
TA_CDLCOUNTERATTACK( 0, n - 1, open, high, low, close, &outBegIdx, &outNBElement, out );
printf( "%d values from bar %d; last out = %d\n", outNBElement, outBegIdx, out[outNBElement - 1] );

Rust

use ta_lib::Core;

let open = vec![0.0; 252]; // your data, oldest first
let high = vec![0.0; 252]; // your data, oldest first
let low = vec![0.0; 252]; // your data, oldest first
let close = vec![0.0; 252]; // your data, oldest first
let mut out = vec![0i32; 252];

let core = Core::new();
let range = core.cdlcounterattack(0, open.len() - 1, &open, &high, &low, &close, &mut out)?;
println!("{} values from bar {}; last out = {}", range.count, range.beg_idx, out[range.count - 1]);

Java

import io.github.talib.Core;
import io.github.talib.OutRange;

double[] open = new double[252]; // your data, oldest first
double[] high = new double[252]; // your data, oldest first
double[] low = new double[252]; // your data, oldest first
double[] close = new double[252]; // your data, oldest first
int[] out = new int[252];

Core core = Core.DEFAULT;
OutRange r = core.cdlcounterattack(0, open.length - 1, open, high, low, close, out);
System.out.println(r.count() + " values from bar " + r.begIdx() + "; last out = " + out[r.count() - 1]);

using System;
using TALib;

var open = new double[252]; // your data, oldest first
var high = new double[252]; // your data, oldest first
var low = new double[252]; // your data, oldest first
var close = new double[252]; // your data, oldest first
var outInteger = new int[252];

var core = Core.Default;
OutRange r = core.Cdlcounterattack(0, open.Length - 1, open, high, low, close, outInteger);
Console.WriteLine($"{r.Count} values from bar {r.BegIdx}; last outInteger = {outInteger[r.Count - 1]}");

TypeScript

import { cdlcounterattack } from 'ta-lib';

const open = new Float64Array(252); // your data, oldest first
const high = new Float64Array(252); // your data, oldest first
const low = new Float64Array(252); // your data, oldest first
const close = new Float64Array(252); // your data, oldest first

const { begIdx, values } = cdlcounterattack({ open, high, low, close });
console.log(values.length + ' values from bar ' + begIdx + '; last values = ' + values[values.length - 1]);

Implementation

Added in 0.4.0.

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

Native	File
C	`ta_CDLCOUNTERATTACK.c`
Rust	`cdlcounterattack.rs`
Java	`Core_CDLCOUNTERATTACK.java`
C#	`Core_CDLCOUNTERATTACK.cs`
TypeScript	`cdlcounterattack.ts`

Python: talib.CDLCOUNTERATTACK, see ta-lib-python.

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

Aliases

Counterattack, Counterattack Lines, Meeting Lines