Smoothed HA Histogram

A custom indicator created by Dan Ushman on TrendSpider. You can import this custom indicator into your TrendSpider account. Don't have TrendSpider? Create an account first, then import the custom indicator.

Source code

This indicator had been implemented by Dan Ushman in JavaScript on TrendSpider. Check out the developer documentation to learn more about JS on TrendSpider.

// Smoothed HA Histogram
describe_indicator('Smoothed HA Histogram', 'lower');

const beforeMAType = input('Before MA', 'ema', constants.ma_types);
const afterMAType = input('After MA', 'ema', constants.ma_types);

const smoothLength = input('Before Smooth', 5, { min: 1, max: 100 });
const afterSmoothLength = input('After Smooth', 5, { min: 1, max: 100 });

const smoothOpen = indicators[beforeMAType](open, smoothLength);
const smoothHigh = indicators[beforeMAType](high, smoothLength);
const smoothLow = indicators[beforeMAType](low, smoothLength);
const smoothClose = indicators[beforeMAType](close, smoothLength);

const haOpenSeries = series_of(null);
const haHighSeries = series_of(null);
const haLowSeries = series_of(null);
const haCloseSeries = series_of(null);

for (let candleIndex = 0; candleIndex < time.length; candleIndex += 1) {
    const haClose = (smoothOpen[candleIndex] + smoothHigh[candleIndex] + smoothLow[candleIndex] + smoothClose[candleIndex]) / 4;

    const haOpen = haOpenSeries[candleIndex - 1]
        ? ((haOpenSeries[candleIndex - 1] + haCloseSeries[candleIndex - 1]) / 2)
        : ((smoothOpen[candleIndex] + smoothClose[candleIndex]) / 2);

    const haHigh = Math.max(smoothHigh[candleIndex], haClose, haOpen);
    const haLow = Math.min(smoothLow[candleIndex], haClose, haOpen);

    haOpenSeries[candleIndex] = haOpen;
    haCloseSeries[candleIndex] = haClose;
    haHighSeries[candleIndex] = haHigh;
    haLowSeries[candleIndex] = haLow;
}

const haSmoothOpenSeries = indicators[afterMAType](haOpenSeries, afterSmoothLength);
const haSmoothCloseSeries = indicators[afterMAType](haCloseSeries, afterSmoothLength);

// Create histogram values: +1 for green candles, -1 for red candles
const histogram = series_of(null);

for (let i = 0; i < haSmoothOpenSeries.length; i++) {
    if (haSmoothCloseSeries[i] > haSmoothOpenSeries[i]) {
        histogram[i] = 1; // Green candle
    } else {
        histogram[i] = -1; // Red candle
    }
}

// Paint the histogram
paint(histogram, {
    style: 'histogram',
    color: histogram.map(value => (value > 0 ? '#eeeeee' : '#eeeeee')),
    width: 2, // Adjust histogram bar width if needed
});