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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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'use strict';
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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if (typeof b !== "function" && b !== null)
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throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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import SeriesRegistry from '../../../Core/Series/SeriesRegistry.js';
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var EMAIndicator = SeriesRegistry.seriesTypes.ema;
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import U from '../../../Core/Utilities.js';
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var correctFloat = U.correctFloat, isArray = U.isArray, merge = U.merge;
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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 DEMA series Type
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*
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* @private
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* @class
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* @name Highcharts.seriesTypes.dema
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*
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* @augments Highcharts.Series
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*/
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var DEMAIndicator = /** @class */ (function (_super) {
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__extends(DEMAIndicator, _super);
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function DEMAIndicator() {
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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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var _this = _super !== null && _super.apply(this, arguments) || this;
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/* *
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*
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* Properties
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*
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* */
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_this.EMApercent = void 0;
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_this.data = void 0;
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_this.options = void 0;
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_this.points = void 0;
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return _this;
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}
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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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DEMAIndicator.prototype.getEMA = function (yVal, prevEMA, SMA, index, i, xVal) {
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return EMAIndicator.prototype.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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DEMAIndicator.prototype.getValues = function (series, params) {
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var period = params.period, doubledPeriod = 2 * period, xVal = series.xData, yVal = series.yData, yValLen = yVal ? yVal.length : 0, index = -1, accumulatePeriodPoints = 0, SMA = 0, DEMA = [], xDataDema = [], yDataDema = [], EMA = 0,
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// EMA(EMA)
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EMAlevel2,
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// EMA of previous point
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prevEMA, prevEMAlevel2,
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// EMA values array
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EMAvalues = [], i, DEMAPoint;
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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 < 2 * period - 1) {
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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 =
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EMAIndicator.prototype.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 + 2; i++) {
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if (i < yValLen + 1) {
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EMA = this.getEMA(yVal, prevEMA, SMA, index, i)[1];
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EMAvalues.push(EMA);
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}
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prevEMA = EMA;
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// Summing first period points for EMA(EMA)
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if (i < doubledPeriod) {
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accumulatePeriodPoints += EMA;
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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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}
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EMA = EMAvalues[i - period - 1];
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EMAlevel2 = this.getEMA([EMA], prevEMAlevel2, SMA)[1];
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DEMAPoint = [
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xVal[i - 2],
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correctFloat(2 * EMA - EMAlevel2)
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];
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DEMA.push(DEMAPoint);
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xDataDema.push(DEMAPoint[0]);
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yDataDema.push(DEMAPoint[1]);
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prevEMAlevel2 = EMAlevel2;
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}
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}
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return {
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values: DEMA,
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xData: xDataDema,
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yData: yDataDema
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};
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};
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/**
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* Double exponential moving average (DEMA) 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/dema
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* DEMA 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/dema
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* @optionparent plotOptions.dema
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*/
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DEMAIndicator.defaultOptions = merge(EMAIndicator.defaultOptions);
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return DEMAIndicator;
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}(EMAIndicator));
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SeriesRegistry.registerSeriesType('dema', DEMAIndicator);
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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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export default DEMAIndicator;
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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 `DEMA` series. If the [type](#series.dema.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.dema
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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/dema
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* @apioption series.dema
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*/
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''; // adds doclet above to the transpiled file
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