Morning Star (CDLMORNINGSTAR)

Summary

A three-candle bottom-reversal pattern: a long black candle, a small-bodied star gapping down, then a white candle closing well up into the first candle's body. Bullish reversal signal. A hit signals a bullish reversal (most meaningful after a downtrend, which the code does not check).

Chart

Reference data (CSV) · Chart (SVG)

Chart metadata i

Outputs

outInteger: pattern_bull_bear · zero · positive

Notes

The gap-down is measured between the candles' real bodies, not between their high/low ranges.
A prior downtrend is not verified.
Bulkowski ranks the Morning Star unusually high — 6th of 103 for reversal rate (78%) and 12th of 103 for overall post-breakout performance — one of the few classic candle patterns whose textbook reputation his statistics confirm rather than debunk. (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 morning star is detected, 0 otherwise. Never negative (pattern is exclusively bullish)

Output Values

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

Value	Meaning
0	No pattern
100	Morning Star detected — bullish (bottom) reversal signal

Parameters

Parameter	Type	Default	Accepted values	Description
`optInPenetration`	real	0.3	≥ 0	Fraction of the 1st candle's body the 3rd close must exceed above the 1st close; larger = deeper penetration required

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_CDLMORNINGSTAR( 0, n - 1, open, high, low, close, 0.3, &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.cdlmorningstar(0, open.len() - 1, &open, &high, &low, &close, 0.3,
                                &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.cdlmorningstar(0, open.length - 1, open, high, low, close, 0.3, 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.Cdlmorningstar(0, open.Length - 1, open, high, low, close, 0.3, outInteger);
Console.WriteLine($"{r.Count} values from bar {r.BegIdx}; last outInteger = {outInteger[r.Count - 1]}");

TypeScript

import { cdlmorningstar } 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 } = cdlmorningstar({ open, high, low, close }, {
  penetration: 0.3,
});
console.log(values.length + ' values from bar ' + begIdx + '; last values = ' + values[values.length - 1]);

Implementation

Added in 0.4.0.

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

Native	File
C	`ta_CDLMORNINGSTAR.c`
Rust	`cdlmorningstar.rs`
Java	`Core_CDLMORNINGSTAR.java`
C#	`Core_CDLMORNINGSTAR.cs`
TypeScript	`cdlmorningstar.ts`

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

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

Aliases

Morning Star