223 lines
9.2 KiB
JavaScript
223 lines
9.2 KiB
JavaScript
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/**
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* @license Highstock JS v11.4.1 (2024-04-04)
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*
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* Indicator series type for Highcharts Stock
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*
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* (c) 2010-2024 Rafal Sebestjanski
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*
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* License: www.highcharts.com/license
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*/
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(function (factory) {
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if (typeof module === 'object' && module.exports) {
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factory['default'] = factory;
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module.exports = factory;
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} else if (typeof define === 'function' && define.amd) {
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define('highcharts/indicators/tema', ['highcharts', 'highcharts/modules/stock'], function (Highcharts) {
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factory(Highcharts);
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factory.Highcharts = Highcharts;
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return factory;
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});
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} else {
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factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined);
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}
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}(function (Highcharts) {
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'use strict';
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var _modules = Highcharts ? Highcharts._modules : {};
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function _registerModule(obj, path, args, fn) {
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if (!obj.hasOwnProperty(path)) {
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obj[path] = fn.apply(null, args);
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if (typeof CustomEvent === 'function') {
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window.dispatchEvent(new CustomEvent(
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'HighchartsModuleLoaded',
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{ detail: { path: path, module: obj[path] } }
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));
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}
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}
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}
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_registerModule(_modules, 'Stock/Indicators/TEMA/TEMAIndicator.js', [_modules['Core/Series/SeriesRegistry.js'], _modules['Core/Utilities.js']], function (SeriesRegistry, U) {
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/* *
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*
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* License: www.highcharts.com/license
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*
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* !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
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*
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* */
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const { ema: EMAIndicator } = SeriesRegistry.seriesTypes;
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const { correctFloat, isArray, merge } = U;
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/* *
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*
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* Class
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*
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* */
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/**
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* The TEMA series type.
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*
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* @private
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* @class
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* @name Highcharts.seriesTypes.tema
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*
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* @augments Highcharts.Series
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*/
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class TEMAIndicator extends EMAIndicator {
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/* *
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*
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* Functions
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*
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* */
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getEMA(yVal, prevEMA, SMA, index, i, xVal) {
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return super.calculateEma(xVal || [], yVal, typeof i === 'undefined' ? 1 : i, this.EMApercent, prevEMA, typeof index === 'undefined' ? -1 : index, SMA);
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}
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getTemaPoint(xVal, tripledPeriod, EMAlevels, i) {
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const TEMAPoint = [
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xVal[i - 3],
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correctFloat(3 * EMAlevels.level1 -
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3 * EMAlevels.level2 + EMAlevels.level3)
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];
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return TEMAPoint;
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}
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getValues(series, params) {
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const period = params.period, doubledPeriod = 2 * period, tripledPeriod = 3 * period, xVal = series.xData, yVal = series.yData, yValLen = yVal ? yVal.length : 0, tema = [], xDataTema = [], yDataTema = [],
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// EMA values array
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emaValues = [], emaLevel2Values = [],
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// This object contains all EMA EMAlevels calculated like below
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// EMA = level1
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// EMA(EMA) = level2,
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// EMA(EMA(EMA)) = level3,
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emaLevels = {};
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let index = -1, accumulatePeriodPoints = 0, sma = 0,
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// EMA of previous point
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prevEMA, prevEMAlevel2, i, temaPoint;
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this.EMApercent = (2 / (period + 1));
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// Check period, if bigger than EMA points length, skip
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if (yValLen < 3 * period - 2) {
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return;
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}
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// Switch index for OHLC / Candlestick / Arearange
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if (isArray(yVal[0])) {
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index = params.index ? params.index : 0;
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}
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// Accumulate first N-points
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accumulatePeriodPoints = super.accumulatePeriodPoints(period, index, yVal);
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// First point
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sma = accumulatePeriodPoints / period;
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accumulatePeriodPoints = 0;
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// Calculate value one-by-one for each period in visible data
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for (i = period; i < yValLen + 3; i++) {
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if (i < yValLen + 1) {
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emaLevels.level1 = this.getEMA(yVal, prevEMA, sma, index, i)[1];
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emaValues.push(emaLevels.level1);
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}
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prevEMA = emaLevels.level1;
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// Summing first period points for ema(ema)
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if (i < doubledPeriod) {
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accumulatePeriodPoints += emaLevels.level1;
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}
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else {
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// Calculate dema
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// First dema point
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if (i === doubledPeriod) {
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sma = accumulatePeriodPoints / period;
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accumulatePeriodPoints = 0;
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}
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emaLevels.level1 = emaValues[i - period - 1];
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emaLevels.level2 = this.getEMA([emaLevels.level1], prevEMAlevel2, sma)[1];
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emaLevel2Values.push(emaLevels.level2);
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prevEMAlevel2 = emaLevels.level2;
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// Summing first period points for ema(ema(ema))
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if (i < tripledPeriod) {
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accumulatePeriodPoints += emaLevels.level2;
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}
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else {
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// Calculate tema
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// First tema point
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if (i === tripledPeriod) {
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sma = accumulatePeriodPoints / period;
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}
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if (i === yValLen + 1) {
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// Calculate the last ema and emaEMA points
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emaLevels.level1 = emaValues[i - period - 1];
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emaLevels.level2 = this.getEMA([emaLevels.level1], prevEMAlevel2, sma)[1];
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emaLevel2Values.push(emaLevels.level2);
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}
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emaLevels.level1 = emaValues[i - period - 2];
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emaLevels.level2 = emaLevel2Values[i - 2 * period - 1];
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emaLevels.level3 = this.getEMA([emaLevels.level2], emaLevels.prevLevel3, sma)[1];
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temaPoint = this.getTemaPoint(xVal, tripledPeriod, emaLevels, i);
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// Make sure that point exists (for TRIX oscillator)
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if (temaPoint) {
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tema.push(temaPoint);
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xDataTema.push(temaPoint[0]);
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yDataTema.push(temaPoint[1]);
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}
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emaLevels.prevLevel3 = emaLevels.level3;
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}
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}
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}
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return {
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values: tema,
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xData: xDataTema,
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yData: yDataTema
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};
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}
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}
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/* *
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*
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* Static Properties
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*
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* */
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/**
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* Triple exponential moving average (TEMA) indicator. This series requires
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* `linkedTo` option to be set and should be loaded after the
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* `stock/indicators/indicators.js`.
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*
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* @sample {highstock} stock/indicators/tema
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* TEMA indicator
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*
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* @extends plotOptions.ema
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* @since 7.0.0
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* @product highstock
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* @excluding allAreas, colorAxis, compare, compareBase, joinBy, keys,
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* navigatorOptions, pointInterval, pointIntervalUnit,
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* pointPlacement, pointRange, pointStart, showInNavigator,
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* stacking
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* @requires stock/indicators/indicators
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* @requires stock/indicators/tema
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* @optionparent plotOptions.tema
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*/
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TEMAIndicator.defaultOptions = merge(EMAIndicator.defaultOptions);
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SeriesRegistry.registerSeriesType('tema', TEMAIndicator);
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/* *
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*
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* Default Export
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*
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* */
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/* *
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*
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* API Options
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*
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* */
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/**
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* A `TEMA` series. If the [type](#series.tema.type) option is not
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* specified, it is inherited from [chart.type](#chart.type).
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*
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* @extends series,plotOptions.tema
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* @since 7.0.0
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* @product highstock
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* @excluding allAreas, colorAxis, compare, compareBase, dataParser, dataURL,
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* joinBy, keys, navigatorOptions, pointInterval, pointIntervalUnit,
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* pointPlacement, pointRange, pointStart, showInNavigator, stacking
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* @requires stock/indicators/indicators
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* @requires stock/indicators/tema
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* @apioption series.tema
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*/
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''; // To include the above in the js output
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return TEMAIndicator;
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});
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_registerModule(_modules, 'masters/indicators/tema.src.js', [_modules['Core/Globals.js']], function (Highcharts) {
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return Highcharts;
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});
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}));
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