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static/lib/Highcharts-10.2.1/es-modules/Stock/Indicators/ROC/ROCIndicator.js

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+/* *
+ *
+ *  (c) 2010-2021 Kacper Madej
+ *
+ *  License: www.highcharts.com/license
+ *
+ *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
+ *
+ * */
+'use strict';
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = function (d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+    return function (d, b) {
+        if (typeof b !== "function" && b !== null)
+            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+import SeriesRegistry from '../../../Core/Series/SeriesRegistry.js';
+var SMAIndicator = SeriesRegistry.seriesTypes.sma;
+import U from '../../../Core/Utilities.js';
+var isArray = U.isArray, merge = U.merge, extend = U.extend;
+/* *
+ *
+ *  Functions
+ *
+ * */
+// Utils:
+function populateAverage(xVal, yVal, i, period, index) {
+    /* Calculated as:
+
+       (Closing Price [today] - Closing Price [n days ago]) /
+        Closing Price [n days ago] * 100
+
+       Return y as null when avoiding division by zero */
+    var nDaysAgoY, rocY;
+    if (index < 0) {
+        // y data given as an array of values
+        nDaysAgoY = yVal[i - period];
+        rocY = nDaysAgoY ?
+            (yVal[i] - nDaysAgoY) / nDaysAgoY * 100 :
+            null;
+    }
+    else {
+        // y data given as an array of arrays and the index should be used
+        nDaysAgoY = yVal[i - period][index];
+        rocY = nDaysAgoY ?
+            (yVal[i][index] - nDaysAgoY) / nDaysAgoY * 100 :
+            null;
+    }
+    return [xVal[i], rocY];
+}
+/* *
+ *
+ *  Class
+ *
+ * */
+/**
+ * The ROC series type.
+ *
+ * @private
+ * @class
+ * @name Highcharts.seriesTypes.roc
+ *
+ * @augments Highcharts.Series
+ */
+var ROCIndicator = /** @class */ (function (_super) {
+    __extends(ROCIndicator, _super);
+    function ROCIndicator() {
+        /* *
+         *
+         *  Static Properties
+         *
+         * */
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        /* *
+         *
+         *  Properties
+         *
+         * */
+        _this.data = void 0;
+        _this.options = void 0;
+        _this.points = void 0;
+        return _this;
+    }
+    /* *
+     *
+     *  Functions
+     *
+     * */
+    ROCIndicator.prototype.getValues = function (series, params) {
+        var period = params.period, xVal = series.xData, yVal = series.yData, yValLen = yVal ? yVal.length : 0, ROC = [], xData = [], yData = [], i, index = -1, ROCPoint;
+        // Period is used as a number of time periods ago, so we need more
+        // (at least 1 more) data than the period value
+        if (xVal.length <= period) {
+            return;
+        }
+        // Switch index for OHLC / Candlestick / Arearange
+        if (isArray(yVal[0])) {
+            index = params.index;
+        }
+        // i = period <-- skip first N-points
+        // Calculate value one-by-one for each period in visible data
+        for (i = period; i < yValLen; i++) {
+            ROCPoint = populateAverage(xVal, yVal, i, period, index);
+            ROC.push(ROCPoint);
+            xData.push(ROCPoint[0]);
+            yData.push(ROCPoint[1]);
+        }
+        return {
+            values: ROC,
+            xData: xData,
+            yData: yData
+        };
+    };
+    /**
+     * Rate of change indicator (ROC). The indicator value for each point
+     * is defined as:
+     *
+     * `(C - Cn) / Cn * 100`
+     *
+     * where: `C` is the close value of the point of the same x in the
+     * linked series and `Cn` is the close value of the point `n` periods
+     * ago. `n` is set through [period](#plotOptions.roc.params.period).
+     *
+     * This series requires `linkedTo` option to be set.
+     *
+     * @sample stock/indicators/roc
+     *         Rate of change indicator
+     *
+     * @extends      plotOptions.sma
+     * @since        6.0.0
+     * @product      highstock
+     * @requires     stock/indicators/indicators
+     * @requires     stock/indicators/roc
+     * @optionparent plotOptions.roc
+     */
+    ROCIndicator.defaultOptions = merge(SMAIndicator.defaultOptions, {
+        params: {
+            index: 3,
+            period: 9
+        }
+    });
+    return ROCIndicator;
+}(SMAIndicator));
+extend(ROCIndicator.prototype, {
+    nameBase: 'Rate of Change'
+});
+SeriesRegistry.registerSeriesType('roc', ROCIndicator);
+/* *
+ *
+ *  Default Export
+ *
+ * */
+export default ROCIndicator;
+/* *
+ *
+ *  API Options
+ *
+ * */
+/**
+ * A `ROC` series. If the [type](#series.wma.type) option is not
+ * specified, it is inherited from [chart.type](#chart.type).
+ *
+ * Rate of change indicator (ROC). The indicator value for each point
+ * is defined as:
+ *
+ * `(C - Cn) / Cn * 100`
+ *
+ * where: `C` is the close value of the point of the same x in the
+ * linked series and `Cn` is the close value of the point `n` periods
+ * ago. `n` is set through [period](#series.roc.params.period).
+ *
+ * This series requires `linkedTo` option to be set.
+ *
+ * @extends   series,plotOptions.roc
+ * @since     6.0.0
+ * @product   highstock
+ * @excluding dataParser, dataURL
+ * @requires  stock/indicators/indicators
+ * @requires  stock/indicators/roc
+ * @apioption series.roc
+ */
+''; // to include the above in the js output