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

Techincal Indicators written in javascript

import CandlestickFinder from './CandlestickFinder';
export default class PiercingLine extends CandlestickFinder {
    constructor() {
        super();
        this.requiredCount = 2;
        this.name = 'PiercingLine';
    }
    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 firstdaysMidpoint = ((firstdaysOpen + firstdaysClose) / 2);
        let isDowntrend = seconddaysLow < firstdaysLow;
        let isFirstBearish = firstdaysClose < firstdaysOpen;
        let isSecondBullish = seconddaysClose > seconddaysOpen;
        let isPiercingLinePattern = ((firstdaysLow > seconddaysOpen) &&
            (seconddaysClose > firstdaysMidpoint));
        return (isDowntrend && isFirstBearish && isPiercingLinePattern && isSecondBullish);
    }
}
export function piercingline(data) {
    return new PiercingLine().hasPattern(data);
}