technicalindicators/lib/candlestick/EveningStar.js

Techincal Indicators written in javascript

import CandlestickFinder from './CandlestickFinder';
export default class EveningStar extends CandlestickFinder {
    constructor() {
        super();
        this.name = 'EveningStar';
        this.requiredCount = 3;
    }
    logic(data) {
        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 isFirstBullish = firstdaysClose > firstdaysOpen;
        let isSmallBodyExists = ((firstdaysHigh < seconddaysLow) &&
            (firstdaysHigh < seconddaysHigh));
        let isThirdBearish = thirddaysOpen > thirddaysClose;
        let gapExists = ((seconddaysHigh > firstdaysHigh) &&
            (seconddaysLow > firstdaysHigh) &&
            (thirddaysOpen < seconddaysLow) &&
            (seconddaysClose > thirddaysOpen));
        let doesCloseBelowFirstMidpoint = thirddaysClose < firstdaysMidpoint;
        return (isFirstBullish && isSmallBodyExists && gapExists && isThirdBearish && doesCloseBelowFirstMidpoint);
    }
}
export function eveningstar(data) {
    return new EveningStar().hasPattern(data);
}