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

Techincal Indicators written in javascript

import CandlestickFinder from './CandlestickFinder';
export default class MorningStar extends CandlestickFinder {
    constructor() {
        super();
        this.name = 'MorningStar';
        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 firstdaysMidpoint = ((firstdaysOpen + firstdaysClose) / 2);
        let isFirstBearish = firstdaysClose < firstdaysOpen &&
            (firstdaysOpen - firstdaysClose > 3 * Math.abs(seconddaysOpen - seconddaysClose));
        let isThirdBullish = (thirddaysClose > thirddaysOpen) &&
            (thirddaysClose - thirddaysOpen > 3 * Math.abs(seconddaysOpen - seconddaysClose)) &&
            (thirddaysClose > seconddaysOpen) &&
            (thirddaysClose > seconddaysClose);
        let gapExists = ((seconddaysHigh < firstdaysLow) &&
            (seconddaysLow < firstdaysLow) &&
            (thirddaysOpen > seconddaysHigh) &&
            (seconddaysClose < thirddaysOpen));
        let doesCloseAboveFirstMidpoint = thirddaysClose > firstdaysMidpoint;
        return isFirstBearish &&
            isThirdBullish &&
            doesCloseAboveFirstMidpoint &&
            (!needGap || gapExists);
    }
}
export function morningstar(data, needGap) {
    return new MorningStar().hasPattern(data, needGap);
}