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/* *
*
* License: www.highcharts.com/license
*
* */
'use strict';
import H from '../parts/Globals.js';
import multipleLinesMixin from '../mixins/multipe-lines.js';
// Utils
// Index of element with extreme value from array (min or max)
function getExtremeIndexInArray(arr, extreme) {
var extremeValue = arr[0],
valueIndex = 0,
i;
for (i = 1; i < arr.length; i++) {
if (
extreme === 'max' && arr[i] >= extremeValue ||
extreme === 'min' && arr[i] <= extremeValue
) {
extremeValue = arr[i];
valueIndex = i;
}
}
return valueIndex;
}
/**
* The Aroon series type.
*
* @private
* @class
* @name Highcharts.seriesTypes.aroon
*
* @augments Highcharts.Series
*/
H.seriesType(
'aroon',
'sma',
/**
* Aroon. This series requires the `linkedTo` option to be
* set and should be loaded after the `stock/indicators/indicators.js`.
*
* @sample {highstock} stock/indicators/aroon
* Aroon
*
* @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.aroon
*/
{
/**
* Paramters used in calculation of aroon series points.
*
* @excluding periods, index
*/
params: {
/**
* Period for Aroon indicator
*/
period: 25
},
marker: {
enabled: false
},
tooltip: {
pointFormat: '<span style="color:{point.color}">\u25CF</span><b> {series.name}</b><br/>Aroon Up: {point.y}<br/>Aroon Down: {point.aroonDown}<br/>'
},
/**
* aroonDown line options.
*/
aroonDown: {
/**
* Styles for an aroonDown line.
*/
styles: {
/**
* Pixel width of the line.
*/
lineWidth: 1,
/**
* Color of the line. If not set, it's inherited from
* [plotOptions.aroon.color](#plotOptions.aroon.color).
*
* @type {Highcharts.ColorString}
*/
lineColor: undefined
}
},
dataGrouping: {
approximation: 'averages'
}
},
/**
* @lends Highcharts.Series#
*/
H.merge(multipleLinesMixin, {
nameBase: 'Aroon',
pointArrayMap: ['y', 'aroonDown'],
pointValKey: 'y',
linesApiNames: ['aroonDown'],
getValues: function (series, params) {
var period = params.period,
xVal = series.xData,
yVal = series.yData,
yValLen = yVal ? yVal.length : 0,
AR = [], // 0- date, 1- Aroon Up, 2- Aroon Down
xData = [],
yData = [],
slicedY,
low = 2,
high = 1,
aroonUp,
aroonDown,
xLow,
xHigh,
i;
// 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 + 2);
xLow = getExtremeIndexInArray(slicedY.map(function (elem) {
return H.pick(elem[low], elem);
}), 'min');
xHigh = getExtremeIndexInArray(slicedY.map(function (elem) {
return H.pick(elem[high], elem);
}), 'max');
aroonUp = (xHigh / period) * 100;
aroonDown = (xLow / period) * 100;
if (xVal[i + 1]) {
AR.push([xVal[i + 1], aroonUp, aroonDown]);
xData.push(xVal[i + 1]);
yData.push([aroonUp, aroonDown]);
}
}
return {
values: AR,
xData: xData,
yData: yData
};
}
})
);
/**
* A Aroon indicator. If the [type](#series.aroon.type) option is not
* specified, it is inherited from [chart.type](#chart.type).
*
* @extends series,plotOptions.aroon
* @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.aroon
*/