stock-vsa-analyzer/src/indicators/pv.js

const calculatePV = (priceData, volumeData) => {
    if (priceData.length !== volumeData.length) {
        throw new Error("Price and volume data must have the same length");
    }

    const pv = [];
    for (let i = 0; i < priceData.length; i++) {
        const priceChange = priceData[i] - (priceData[i - 1] || priceData[i]);
        const volume = volumeData[i];
        pv.push(priceChange * volume);
    }
    return pv;
};

const analyzePV = (pvData) => {
    const analysis = {
        bullish: 0,
        bearish: 0,
        neutral: 0,
    };

    for (let i = 1; i < pvData.length; i++) {
        if (pvData[i] > 0 && pvData[i - 1] > 0) {
            analysis.bullish++;
        } else if (pvData[i] < 0 && pvData[i - 1] < 0) {
            analysis.bearish++;
        } else {
            analysis.neutral++;
        }
    }
    return analysis;
};

export { calculatePV, analyzePV };