198 lines
6.5 KiB
JavaScript
198 lines
6.5 KiB
JavaScript
/**
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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 Kacper Madej
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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/wma', ['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/WMA/WMAIndicator.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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* (c) 2010-2024 Kacper Madej
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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 { sma: SMAIndicator } = SeriesRegistry.seriesTypes;
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const { isArray, merge } = U;
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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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// Utils:
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/**
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* @private
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*/
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function accumulateAverage(points, xVal, yVal, i, index) {
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const xValue = xVal[i], yValue = index < 0 ? yVal[i] : yVal[i][index];
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points.push([xValue, yValue]);
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}
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/**
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* @private
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*/
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function weightedSumArray(array, pLen) {
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// The denominator is the sum of the number of days as a triangular number.
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// If there are 5 days, the triangular numbers are 5, 4, 3, 2, and 1.
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// The sum is 5 + 4 + 3 + 2 + 1 = 15.
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const denominator = (pLen + 1) / 2 * pLen;
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// Reduce VS loop => reduce
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return array.reduce(function (prev, cur, i) {
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return [null, prev[1] + cur[1] * (i + 1)];
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})[1] / denominator;
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}
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/**
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* @private
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*/
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function populateAverage(points, xVal, yVal, i) {
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const pLen = points.length, wmaY = weightedSumArray(points, pLen), wmaX = xVal[i - 1];
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points.shift(); // Remove point until range < period
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return [wmaX, wmaY];
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}
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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 SMA series type.
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*
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* @private
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* @class
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* @name Highcharts.seriesTypes.wma
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*
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* @augments Highcharts.Series
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*/
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class WMAIndicator extends SMAIndicator {
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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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getValues(series, params) {
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const period = params.period, xVal = series.xData, yVal = series.yData, yValLen = yVal ? yVal.length : 0, xValue = xVal[0], wma = [], xData = [], yData = [];
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let range = 1, index = -1, i, wmaPoint, yValue = yVal[0];
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if (xVal.length < period) {
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return;
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}
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// Switch index for OHLC / Candlestick
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if (isArray(yVal[0])) {
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index = params.index;
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yValue = yVal[0][index];
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}
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// Starting point
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const points = [[xValue, yValue]];
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// Accumulate first N-points
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while (range !== period) {
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accumulateAverage(points, xVal, yVal, range, index);
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range++;
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}
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// Calculate value one-by-one for each period in visible data
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for (i = range; i < yValLen; i++) {
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wmaPoint = populateAverage(points, xVal, yVal, i);
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wma.push(wmaPoint);
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xData.push(wmaPoint[0]);
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yData.push(wmaPoint[1]);
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accumulateAverage(points, xVal, yVal, i, index);
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}
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wmaPoint = populateAverage(points, xVal, yVal, i);
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wma.push(wmaPoint);
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xData.push(wmaPoint[0]);
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yData.push(wmaPoint[1]);
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return {
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values: wma,
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xData: xData,
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yData: yData
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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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* Weighted moving average indicator (WMA). This series requires `linkedTo`
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* option to be set.
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*
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* @sample stock/indicators/wma
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* Weighted moving average indicator
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*
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* @extends plotOptions.sma
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* @since 6.0.0
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* @product highstock
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* @requires stock/indicators/indicators
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* @requires stock/indicators/wma
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* @optionparent plotOptions.wma
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*/
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WMAIndicator.defaultOptions = merge(SMAIndicator.defaultOptions, {
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params: {
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index: 3,
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period: 9
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}
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});
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SeriesRegistry.registerSeriesType('wma', WMAIndicator);
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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 `WMA` series. If the [type](#series.wma.type) option is not specified, it
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* is inherited from [chart.type](#chart.type).
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*
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* @extends series,plotOptions.wma
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* @since 6.0.0
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* @product highstock
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* @excluding dataParser, dataURL
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* @requires stock/indicators/indicators
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* @requires stock/indicators/wma
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* @apioption series.wma
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*/
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''; // Adds doclet above to the transpiled file
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return WMAIndicator;
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});
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_registerModule(_modules, 'masters/indicators/wma.src.js', [_modules['Core/Globals.js']], function (Highcharts) {
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return Highcharts;
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});
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})); |