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/* *
*
* License: www.highcharts.com/license
*
* */
'use strict';
import H from '../parts/Globals.js';
import '../parts/Utilities.js';
import reduceArrayMixin from '../mixins/reduce-array.js';
var isArray = H.isArray,
getArrayExtremes = reduceArrayMixin.getArrayExtremes;
/**
* The Williams %R series type.
*
* @private
* @class
* @name Highcharts.seriesTypes.williamsr
*
* @augments Highcharts.Series
*/
H.seriesType(
'williamsr',
'sma',
/**
* Williams %R. This series requires the `linkedTo` option to be
* set and should be loaded after the `stock/indicators/indicators.js`.
*
* @sample {highstock} stock/indicators/williams-r
* Williams %R
*
* @extends plotOptions.sma
* @since 7.0.0
* @product highstock
* @excluding allAreas, colorAxis, joinBy, keys, navigatorOptions,
* pointInterval, pointIntervalUnit, pointPlacement,
* pointRange, pointStart, showInNavigator, stacking
* @optionparent plotOptions.williamsr
*/
{
/**
* Paramters used in calculation of Williams %R series points.
* @excluding index
*/
params: {
/**
* Period for Williams %R oscillator
*/
period: 14
}
},
/**
* @lends Highcharts.Series#
*/
{
nameBase: 'Williams %R',
getValues: function (series, params) {
var period = params.period,
xVal = series.xData,
yVal = series.yData,
yValLen = yVal ? yVal.length : 0,
WR = [], // 0- date, 1- Williams %R
xData = [],
yData = [],
slicedY,
close = 3,
low = 2,
high = 1,
extremes,
R,
HH, // Highest high value in period
LL, // Lowest low value in period
CC, // Current close value
i;
// Williams %R requires close value
if (
xVal.length < period ||
!isArray(yVal[0]) ||
yVal[0].length !== 4
) {
return false;
}
// For a N-period, we start from N-1 point, to calculate Nth point
// That is why we later need to comprehend slice() elements list
// with (+1)
for (i = period - 1; i < yValLen; i++) {
slicedY = yVal.slice(i - period + 1, i + 1);
extremes = getArrayExtremes(slicedY, low, high);
LL = extremes[0];
HH = extremes[1];
CC = yVal[i][close];
R = ((HH - CC) / (HH - LL)) * -100;
if (xVal[i]) {
WR.push([xVal[i], R]);
xData.push(xVal[i]);
yData.push(R);
}
}
return {
values: WR,
xData: xData,
yData: yData
};
}
}
);
/**
* A `Williams %R Oscillator` series. If the [type](#series.williamsr.type)
* option is not specified, it is inherited from [chart.type](#chart.type).
*
* @extends series,plotOptions.williamsr
* @since 7.0.0
* @product highstock
* @excluding allAreas, colorAxis, dataParser, dataURL, joinBy, keys,
* navigatorOptions, pointInterval, pointIntervalUnit,
* pointPlacement, pointRange, pointStart, showInNavigator, stacking
* @apioption series.williamsr
*/