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/* *
*
* License: www.highcharts.com/license
*
* */
'use strict';
import H from '../parts/Globals.js';
import '../parts/Utilities.js';
import multipleLinesMixin from '../mixins/multipe-lines.js';
var SMA = H.seriesTypes.sma,
merge = H.merge,
correctFloat = H.correctFloat;
function getBaseForBand(low, high, factor) {
return ((
(correctFloat(high - low)) /
((correctFloat(high + low)) / 2)
) * 1000) * factor;
}
function getPointUB(high, base) {
return high * (correctFloat(1 + 2 * base));
}
function getPointLB(low, base) {
return low * (correctFloat(1 - 2 * base));
}
/**
* The ABands series type
*
* @private
* @class
* @name Highcharts.seriesTypes.abands
*
* @augments Highcharts.Series
*/
H.seriesType(
'abands',
'sma',
/**
* Acceleration bands (ABANDS). This series requires the `linkedTo` option
* to be set and should be loaded after the
* `stock/indicators/indicators.js`.
*
* @sample {highstock} stock/indicators/acceleration-bands
* Acceleration Bands
*
* @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.abands
*/
{
params: {
period: 20,
/**
* The algorithms factor value used to calculate bands.
*
* @product highstock
*/
factor: 0.001,
index: 3
},
lineWidth: 1,
topLine: {
styles: {
/**
* Pixel width of the line.
*/
lineWidth: 1
}
},
bottomLine: {
styles: {
/**
* Pixel width of the line.
*/
lineWidth: 1
}
},
dataGrouping: {
approximation: 'averages'
}
},
/**
* @lends Highcharts.Series#
*/
merge(multipleLinesMixin, {
pointArrayMap: ['top', 'middle', 'bottom'],
pointValKey: 'middle',
nameBase: 'Acceleration Bands',
nameComponents: ['period', 'factor'],
linesApiNames: ['topLine', 'bottomLine'],
getValues: function (series, params) {
var period = params.period,
factor = params.factor,
index = params.index,
xVal = series.xData,
yVal = series.yData,
yValLen = yVal ? yVal.length : 0,
UB = [], // Upperbands
LB = [], // Lowerbands
// ABANDS array structure:
// 0-date, 1-top line, 2-middle line, 3-bottom line
ABANDS = [],
ML, TL, BL, // middle line, top line and bottom line
date,
bandBase,
pointSMA,
ubSMA,
lbSMA,
low = 2,
high = 1,
xData = [],
yData = [],
slicedX,
slicedY,
i;
if (yValLen < period) {
return false;
}
for (i = 0; i <= yValLen; i++) {
// Get UB and LB values of every point. This condition
// is necessary, because there is a need to calculate current
// UB nad LB values simultaneously with given period SMA
// in one for loop.
if (i < yValLen) {
bandBase = getBaseForBand(
yVal[i][low],
yVal[i][high],
factor
);
UB.push(getPointUB(yVal[i][high], bandBase));
LB.push(getPointLB(yVal[i][low], bandBase));
}
if (i >= period) {
slicedX = xVal.slice(i - period, i);
slicedY = yVal.slice(i - period, i);
ubSMA = SMA.prototype.getValues.call(this, {
xData: slicedX,
yData: UB.slice(i - period, i)
}, {
period: period
});
lbSMA = SMA.prototype.getValues.call(this, {
xData: slicedX,
yData: LB.slice(i - period, i)
}, {
period: period
});
pointSMA = SMA.prototype.getValues.call(this, {
xData: slicedX,
yData: slicedY
}, {
period: period,
index: index
});
date = pointSMA.xData[0];
TL = ubSMA.yData[0];
BL = lbSMA.yData[0];
ML = pointSMA.yData[0];
ABANDS.push([date, TL, ML, BL]);
xData.push(date);
yData.push([TL, ML, BL]);
}
}
return {
values: ABANDS,
xData: xData,
yData: yData
};
}
})
);
/**
* An Acceleration bands indicator. If the [type](#series.pc.type) option is not
* specified, it is inherited from [chart.type](#chart.type).
*
* @extends series,plotOptions.abands
* @since 7.0.0
* @product highstock
* @excluding allAreas, colorAxis, compare, compareBase, dataParser, dataURL,
* joinBy, keys, navigatorOptions, pointInterval,
* pointIntervalUnit, pointPlacement, pointRange, pointStart,
* stacking, showInNavigator,
* @optionparent series.abands
*/