highcharts
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JavaScript charting framework
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JavaScript
/* *
*
* (c) 2010-2021 Kacper Madej
*
* License: www.highcharts.com/license
*
* !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
*
* */
;
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 (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
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;
/* eslint-disable valid-jsdoc */
// Utils:
/**
* @private
*/
function accumulateAverage(points, xVal, yVal, i, index) {
var xValue = xVal[i], yValue = index < 0 ? yVal[i] : yVal[i][index];
points.push([xValue, yValue]);
}
/**
* @private
*/
function weightedSumArray(array, pLen) {
// The denominator is the sum of the number of days as a triangular number.
// If there are 5 days, the triangular numbers are 5, 4, 3, 2, and 1.
// The sum is 5 + 4 + 3 + 2 + 1 = 15.
var denominator = (pLen + 1) / 2 * pLen;
// reduce VS loop => reduce
return array.reduce(function (prev, cur, i) {
return [null, prev[1] + cur[1] * (i + 1)];
})[1] / denominator;
}
/**
* @private
*/
function populateAverage(points, xVal, yVal, i) {
var pLen = points.length, wmaY = weightedSumArray(points, pLen), wmaX = xVal[i - 1];
points.shift(); // remove point until range < period
return [wmaX, wmaY];
}
/* eslint-enable valid-jsdoc */
/**
* The SMA series type.
*
* @private
* @class
* @name Highcharts.seriesTypes.wma
*
* @augments Highcharts.Series
*/
var WMAIndicator = /** @class */ (function (_super) {
__extends(WMAIndicator, _super);
function WMAIndicator() {
var _this = _super !== null && _super.apply(this, arguments) || this;
_this.data = void 0;
_this.options = void 0;
_this.points = void 0;
return _this;
}
WMAIndicator.prototype.getValues = function (series, params) {
var period = params.period, xVal = series.xData, yVal = series.yData, yValLen = yVal ? yVal.length : 0, range = 1, xValue = xVal[0], yValue = yVal[0], WMA = [], xData = [], yData = [], index = -1, i, points, WMAPoint;
if (xVal.length < period) {
return;
}
// Switch index for OHLC / Candlestick
if (isArray(yVal[0])) {
index = params.index;
yValue = yVal[0][index];
}
// Starting point
points = [[xValue, yValue]];
// Accumulate first N-points
while (range !== period) {
accumulateAverage(points, xVal, yVal, range, index);
range++;
}
// Calculate value one-by-one for each period in visible data
for (i = range; i < yValLen; i++) {
WMAPoint = populateAverage(points, xVal, yVal, i);
WMA.push(WMAPoint);
xData.push(WMAPoint[0]);
yData.push(WMAPoint[1]);
accumulateAverage(points, xVal, yVal, i, index);
}
WMAPoint = populateAverage(points, xVal, yVal, i);
WMA.push(WMAPoint);
xData.push(WMAPoint[0]);
yData.push(WMAPoint[1]);
return {
values: WMA,
xData: xData,
yData: yData
};
};
/**
* Weighted moving average indicator (WMA). This series requires `linkedTo`
* option to be set.
*
* @sample stock/indicators/wma
* Weighted moving average indicator
*
* @extends plotOptions.sma
* @since 6.0.0
* @product highstock
* @requires stock/indicators/indicators
* @requires stock/indicators/wma
* @optionparent plotOptions.wma
*/
WMAIndicator.defaultOptions = merge(SMAIndicator.defaultOptions, {
params: {
index: 3,
period: 9
}
});
return WMAIndicator;
}(SMAIndicator));
SeriesRegistry.registerSeriesType('wma', WMAIndicator);
/* *
*
* Default Export
*
* */
export default WMAIndicator;
/**
* A `WMA` series. If the [type](#series.wma.type) option is not specified, it
* is inherited from [chart.type](#chart.type).
*
* @extends series,plotOptions.wma
* @since 6.0.0
* @product highstock
* @excluding dataParser, dataURL
* @requires stock/indicators/indicators
* @requires stock/indicators/wma
* @apioption series.wma
*/
''; // adds doclet above to the transpiled file