chore: add AGENTS.md with build, lint, test commands and style guidelines
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DiTus
255
js/indicators/hts.js
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255
js/indicators/hts.js
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// Self-contained HTS Trend System indicator
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// Includes math, metadata, signal calculation, and base class
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// Signal constants (defined in each indicator file)
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const SIGNAL_TYPES = {
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BUY: 'buy',
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SELL: 'sell',
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HOLD: 'hold'
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};
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const SIGNAL_COLORS = {
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buy: '#26a69a',
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hold: '#787b86',
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sell: '#ef5350'
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};
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// Base class (inline replacement for BaseIndicator)
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class BaseIndicator {
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constructor(config) {
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this.id = config.id;
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this.type = config.type;
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this.name = config.name;
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this.params = config.params || {};
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this.timeframe = config.timeframe || '1m';
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this.series = [];
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this.visible = config.visible !== false;
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this.cachedResults = null;
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this.cachedMeta = null;
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this.lastSignalTimestamp = null;
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this.lastSignalType = null;
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}
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}
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// MA calculations inline (SMA/EMA/RMA/WMA/VWMA)
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function calculateSMA(candles, period, source = 'close') {
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const results = new Array(candles.length).fill(null);
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let sum = 0;
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for (let i = 0; i < candles.length; i++) {
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sum += candles[i][source];
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if (i >= period) sum -= candles[i - period][source];
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if (i >= period - 1) results[i] = sum / period;
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}
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return results;
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}
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function calculateEMA(candles, period, source = 'close') {
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const multiplier = 2 / (period + 1);
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const results = new Array(candles.length).fill(null);
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let ema = 0;
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let sum = 0;
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for (let i = 0; i < candles.length; i++) {
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if (i < period) {
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sum += candles[i][source];
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if (i === period - 1) {
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ema = sum / period;
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results[i] = ema;
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}
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} else {
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ema = (candles[i][source] - ema) * multiplier + ema;
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results[i] = ema;
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}
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}
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return results;
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}
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function calculateRMA(candles, period, source = 'close') {
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const multiplier = 1 / period;
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const results = new Array(candles.length).fill(null);
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let rma = 0;
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let sum = 0;
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for (let i = 0; i < candles.length; i++) {
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if (i < period) {
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sum += candles[i][source];
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if (i === period - 1) {
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rma = sum / period;
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results[i] = rma;
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}
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} else {
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rma = (candles[i][source] - rma) * multiplier + rma;
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results[i] = rma;
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}
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}
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return results;
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}
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function calculateWMA(candles, period, source = 'close') {
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const results = new Array(candles.length).fill(null);
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const weightSum = (period * (period + 1)) / 2;
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for (let i = period - 1; i < candles.length; i++) {
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let sum = 0;
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for (let j = 0; j < period; j++) {
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sum += candles[i - j][source] * (period - j);
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}
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results[i] = sum / weightSum;
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}
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return results;
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}
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function calculateVWMA(candles, period, source = 'close') {
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const results = new Array(candles.length).fill(null);
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for (let i = period - 1; i < candles.length; i++) {
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let sumPV = 0;
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let sumV = 0;
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for (let j = 0; j < period; j++) {
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sumPV += candles[i - j][source] * candles[i - j].volume;
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sumV += candles[i - j].volume;
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}
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results[i] = sumV !== 0 ? sumPV / sumV : null;
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}
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return results;
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}
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// MA dispatcher function
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function getMA(type, candles, period, source = 'close') {
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switch (type.toUpperCase()) {
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case 'SMA': return calculateSMA(candles, period, source);
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case 'EMA': return calculateEMA(candles, period, source);
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case 'RMA': return calculateRMA(candles, period, source);
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case 'WMA': return calculateWMA(candles, period, source);
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case 'VWMA': return calculateVWMA(candles, period, source);
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default: return calculateSMA(candles, period, source);
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}
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}
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// Signal calculation for HTS
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function calculateHTSSignal(indicator, lastCandle, prevCandle, values, prevValues) {
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const slowLow = values?.slowLow;
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const slowHigh = values?.slowHigh;
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const prevSlowLow = prevValues?.slowLow;
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const prevSlowHigh = prevValues?.slowHigh;
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if (!slowLow || !slowHigh || !prevSlowLow || !prevSlowHigh) {
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return null;
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}
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const close = lastCandle.close;
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const prevClose = prevCandle?.close;
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if (prevClose === undefined) return null;
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// BUY: Price crosses UP through slow low
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if (prevClose <= prevSlowLow && close > slowLow) {
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return {
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type: SIGNAL_TYPES.BUY,
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strength: 85,
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value: close,
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reasoning: `Price crossed UP through slow low`
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};
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}
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// SELL: Price crosses DOWN through slow high
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else if (prevClose >= prevSlowHigh && close < slowHigh) {
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return {
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type: SIGNAL_TYPES.SELL,
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strength: 85,
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value: close,
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reasoning: `Price crossed DOWN through slow high`
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};
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}
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return null;
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}
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// HTS Indicator class
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export class HTSIndicator extends BaseIndicator {
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constructor(config) {
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super(config);
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this.lastSignalTimestamp = null;
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this.lastSignalType = null;
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}
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calculate(candles, oneMinCandles = null, targetTF = null) {
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const shortPeriod = this.params.short || 33;
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const longPeriod = this.params.long || 144;
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const maType = this.params.maType || 'RMA';
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const useAutoHTS = this.params.useAutoHTS || false;
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let workingCandles = candles;
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if (useAutoHTS && oneMinCandles && targetTF) {
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const tfMultipliers = {
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'5m': 5,
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'15m': 15,
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'30m': 30,
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'37m': 37,
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'1h': 60,
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'4h': 240
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};
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const tfGroup = tfMultipliers[targetTF] || 5;
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const grouped = [];
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let currentGroup = [];
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for (let i = 0; i < oneMinCandles.length; i++) {
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currentGroup.push(oneMinCandles[i]);
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if (currentGroup.length >= tfGroup) {
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grouped.push({
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time: currentGroup[tfGroup - 1].time,
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open: currentGroup[tfGroup - 1].open,
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high: currentGroup[tfGroup - 1].high,
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low: currentGroup[tfGroup - 1].low,
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close: currentGroup[tfGroup - 1].close,
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volume: currentGroup[tfGroup - 1].volume
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});
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currentGroup = [];
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}
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}
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workingCandles = grouped;
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}
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const shortHigh = getMA(maType, workingCandles, shortPeriod, 'high');
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const shortLow = getMA(maType, workingCandles, shortPeriod, 'low');
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const longHigh = getMA(maType, workingCandles, longPeriod, 'high');
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const longLow = getMA(maType, workingCandles, longPeriod, 'low');
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return workingCandles.map((_, i) => ({
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fastHigh: shortHigh[i],
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fastLow: shortLow[i],
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slowHigh: longHigh[i],
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slowLow: longLow[i],
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fastMidpoint: ((shortHigh[i] || 0) + (shortLow[i] || 0)) / 2,
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slowMidpoint: ((longHigh[i] || 0) + (longLow[i] || 0)) / 2
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}));
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}
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getMetadata() {
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const useAutoHTS = this.params?.useAutoHTS || false;
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const fastLineWidth = useAutoHTS ? 1 : 1;
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const slowLineWidth = useAutoHTS ? 2 : 2;
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return {
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name: 'HTS Trend System',
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description: 'High/Low Trend System with Fast and Slow MAs',
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inputs: [
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{ name: 'short', label: 'Fast Period', type: 'number', default: 33, min: 1, max: 500 },
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{ name: 'long', label: 'Slow Period', type: 'number', default: 144, min: 1, max: 500 },
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{ name: 'maType', label: 'MA Type', type: 'select', options: ['SMA', 'EMA', 'RMA', 'WMA', 'VWMA'], default: 'RMA' },
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{ name: 'useAutoHTS', label: 'Auto HTS (TF/4)', type: 'boolean', default: false }
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],
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plots: [
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{ id: 'fastHigh', color: '#00bcd4', title: 'Fast High', width: fastLineWidth },
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{ id: 'fastLow', color: '#00bcd4', title: 'Fast Low', width: fastLineWidth },
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{ id: 'slowHigh', color: '#f44336', title: 'Slow High', width: slowLineWidth },
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{ id: 'slowLow', color: '#f44336', title: 'Slow Low', width: slowLineWidth }
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],
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displayMode: 'overlay'
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};
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}
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}
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export { calculateHTSSignal };
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