trading-signals/dist/momentum/MOM/MOM.js

Technical indicators to run technical analysis with JavaScript / TypeScript.

import { TradingSignal, TrendIndicatorSeries } from '../../base/Indicator.js';
import { pushUpdate } from '../../util/pushUpdate.js';
export class MOM extends TrendIndicatorSeries {
    #history;
    #historyLength;
    interval;
    constructor(interval) {
        super();
        this.interval = interval;
        this.#historyLength = interval + 1;
        this.#history = [];
    }
    getRequiredInputs() {
        return this.#historyLength;
    }
    update(value, replace) {
        pushUpdate(this.#history, replace, value, this.#historyLength);
        if (this.#history.length === this.#historyLength) {
            return this.setResult(value - this.#history[0], replace);
        }
        return null;
    }
    calculateSignalState(result) {
        const hasResult = result !== null && result !== undefined;
        if (!hasResult) {
            return TradingSignal.UNKNOWN;
        }
        if (result > 0) {
            return TradingSignal.BULLISH;
        }
        if (result < 0) {
            return TradingSignal.BEARISH;
        }
        return TradingSignal.SIDEWAYS;
    }
}
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