@sunrise1002/tats/lib/candlestick/ThreeBlackCrows.js

Techincal Indicators written in javascript

import CandlestickFinder from './CandlestickFinder';
export default class ThreeBlackCrows extends CandlestickFinder {
    constructor() {
        super();
        this.name = 'ThreeBlackCrows';
        this.requiredCount = 3;
    }
    logic(data, needGap) {
        let firstdaysOpen = data.open[0];
        let firstdaysClose = data.close[0];
        let firstdaysHigh = data.high[0];
        let firstdaysLow = data.low[0];
        let seconddaysOpen = data.open[1];
        let seconddaysClose = data.close[1];
        let seconddaysHigh = data.high[1];
        let seconddaysLow = data.low[1];
        let thirddaysOpen = data.open[2];
        let thirddaysClose = data.close[2];
        let thirddaysHigh = data.high[2];
        let thirddaysLow = data.low[2];
        let isDownTrend = firstdaysLow > seconddaysLow &&
            seconddaysLow > thirddaysLow;
        let isAllBearish = firstdaysOpen > firstdaysClose &&
            seconddaysOpen > seconddaysClose &&
            thirddaysOpen > thirddaysClose;
        let doesOpenWithinPreviousBody = firstdaysOpen > seconddaysOpen &&
            seconddaysOpen > firstdaysClose &&
            seconddaysOpen > thirddaysOpen &&
            thirddaysOpen > seconddaysClose;
        return (isDownTrend && isAllBearish && (!needGap || doesOpenWithinPreviousBody));
    }
}
export function threeblackcrows(data, needGap) {
    return new ThreeBlackCrows().hasPattern(data, needGap);
}