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/**
* @license Highcharts JS v7.1.1 (2019-04-09)
*
* Indicator series type for Highstock
*
* (c) 2010-2019 Kacper Madej
*
* 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/roc', ['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/roc.src.js', [_modules['parts/Globals.js']], function (H) {
/* *
*
* (c) 2010-2019 Kacper Madej
*
* License: www.highcharts.com/license
*
* */
var seriesType = H.seriesType,
isArray = H.isArray;
// 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];
}
/**
* The ROC series type.
*
* @private
* @class
* @name Highcharts.seriesTypes.roc
*
* @augments Highcharts.Series
*/
seriesType(
'roc',
'sma',
/**
* 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
* @optionparent plotOptions.roc
*/
{
params: {
index: 3,
period: 9
}
},
/**
* @lends Highcharts.Series#
*/
{
nameBase: 'Rate of Change',
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 false;
}
// 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
};
}
}
);
/**
* 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
* @apioption series.roc
*/
});
_registerModule(_modules, 'masters/indicators/roc.src.js', [], function () {
});
}));