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/**
* @license Highcharts JS v7.1.1 (2019-04-09)
*
* Indicator series type for Highstock
*
* (c) 2010-2019 Wojciech Chmiel
*
* License: www.highcharts.com/license
*/
'use strict';
(function (factory) {
if (typeof module === 'object' && module.exports) {
factory['default'] = factory;
module.exports = factory;
} else if (typeof define === 'function' && define.amd) {
define('highcharts/indicators/dpo', ['highcharts', 'highcharts/modules/stock'], function (Highcharts) {
factory(Highcharts);
factory.Highcharts = Highcharts;
return factory;
});
} else {
factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined);
}
}(function (Highcharts) {
var _modules = Highcharts ? Highcharts._modules : {};
function _registerModule(obj, path, args, fn) {
if (!obj.hasOwnProperty(path)) {
obj[path] = fn.apply(null, args);
}
}
_registerModule(_modules, 'indicators/dpo.src.js', [_modules['parts/Globals.js']], function (H) {
/* *
*
* License: www.highcharts.com/license
*
* */
var correctFloat = H.correctFloat,
pick = H.pick;
// Utils
function accumulatePoints(sum, yVal, i, index, subtract) {
var price = pick(yVal[i][index], yVal[i]);
if (subtract) {
return correctFloat(sum - price);
}
return correctFloat(sum + price);
}
/**
* The DPO series type.
*
* @private
* @class
* @name Highcharts.seriesTypes.dpo
*
* @augments Highcharts.Series
*/
H.seriesType(
'dpo',
'sma',
/**
* Detrended Price Oscillator. This series requires the `linkedTo` option to
* be set and should be loaded after the `stock/indicators/indicators.js`.
*
* @sample {highstock} stock/indicators/dpo
* Detrended Price Oscillator
*
* @extends plotOptions.sma
* @since 7.0.0
* @product highstock
* @excluding allAreas, colorAxis, compare, compareBase, joinBy, keys,
* navigatorOptions, pointInterval, pointIntervalUnit,
* pointPlacement, pointRange, pointStart, showInNavigator,
* stacking
* @optionparent plotOptions.dpo
*/
{
/**
* Parameters used in calculation of Detrended Price Oscillator series
* points.
*/
params: {
/**
* Period for Detrended Price Oscillator
*/
period: 21
}
},
/**
* @lends Highcharts.Series#
*/
{
nameBase: 'DPO',
getValues: function (series, params) {
var period = params.period,
index = params.index,
offset = Math.floor(period / 2 + 1),
range = period + offset,
xVal = series.xData || [],
yVal = series.yData || [],
yValLen = yVal.length,
DPO = [], // 0- date, 1- Detrended Price Oscillator
xData = [],
yData = [],
sum = 0,
oscillator,
periodIndex,
rangeIndex,
price,
i,
j;
if (xVal.length <= range) {
return false;
}
// Accumulate first N-points for SMA
for (i = 0; i < period - 1; i++) {
sum = accumulatePoints(sum, yVal, i, index);
}
// Detrended Price Oscillator formula:
// DPO = Price - Simple moving average [from (n / 2 + 1) days ago]
for (j = 0; j <= yValLen - range; j++) {
periodIndex = j + period - 1;
rangeIndex = j + range - 1;
// adding the last period point
sum = accumulatePoints(sum, yVal, periodIndex, index);
price = pick(yVal[rangeIndex][index], yVal[rangeIndex]);
oscillator = price - sum / period;
// substracting the first period point
sum = accumulatePoints(sum, yVal, j, index, true);
DPO.push([xVal[rangeIndex], oscillator]);
xData.push(xVal[rangeIndex]);
yData.push(oscillator);
}
return {
values: DPO,
xData: xData,
yData: yData
};
}
}
);
/**
* A Detrended Price Oscillator. If the [type](#series.dpo.type) option is not
* specified, it is inherited from [chart.type](#chart.type).
*
* @extends series,plotOptions.dpo
* @since 7.0.0
* @product highstock
* @excluding allAreas, colorAxis, compare, compareBase, dataParser, dataURL,
* joinBy, keys, navigatorOptions, pointInterval, pointIntervalUnit,
* pointPlacement, pointRange, pointStart, showInNavigator, stacking
* @apioption series.dpo
*/
});
_registerModule(_modules, 'masters/indicators/dpo.src.js', [], function () {
});
}));