trading-signals/dist/trend/WSMA/WSMA.js

Technical indicators to run technical analysis with JavaScript / TypeScript.

import { IndicatorSeries } from '../../base/Indicator.js';
import { SMA } from '../SMA/SMA.js';
export class WSMA extends IndicatorSeries {
    #indicator;
    #smoothingFactor;
    interval;
    constructor(interval) {
        super();
        this.interval = interval;
        this.#indicator = new SMA(interval);
        this.#smoothingFactor = 1 / this.interval;
    }
    getRequiredInputs() {
        return this.interval;
    }
    update(price, replace) {
        const sma = this.#indicator.update(price, replace);
        if (replace && this.previousResult !== undefined) {
            const smoothed = (price - this.previousResult) * this.#smoothingFactor;
            return this.setResult(smoothed + this.previousResult, replace);
        }
        else if (!replace && this.result !== undefined) {
            const smoothed = (price - this.result) * this.#smoothingFactor;
            return this.setResult(smoothed + this.result, replace);
        }
        else if (this.result === undefined && sma !== null) {
            return this.setResult(sma, replace);
        }
        return null;
    }
}
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