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/* *
*
* License: www.highcharts.com/license
*
* */
'use strict';
import H from '../parts/Globals.js';
import '../parts/Utilities.js';
import requiredIndicatorMixin from '../mixins/indicator-required.js';
var EMA = H.seriesTypes.ema,
error = H.error,
correctFloat = H.correctFloat,
requiredIndicator = requiredIndicatorMixin;
/**
* The PPO series type.
*
* @private
* @class
* @name Highcharts.seriesTypes.ppo
*
* @augments Highcharts.Series
*/
H.seriesType(
'ppo',
'ema',
/**
* Percentage Price Oscillator. This series requires the
* `linkedTo` option to be set and should be loaded after the
* `stock/indicators/indicators.js` and `stock/indicators/ema.js`.
*
* @sample {highstock} stock/indicators/ppo
* Percentage Price Oscillator
*
* @extends plotOptions.ema
* @since 7.0.0
* @product highstock
* @excluding allAreas, colorAxis, joinBy, keys, navigatorOptions,
* pointInterval, pointIntervalUnit, pointPlacement,
* pointRange, pointStart, showInNavigator, stacking
* @optionparent plotOptions.ppo
*/
{
/**
* Paramters used in calculation of Percentage Price Oscillator series
* points.
*
* @excluding period
*/
params: {
/**
* Periods for Percentage Price Oscillator calculations.
*
* @type {Array<number>}
* @default [12, 26]
*/
periods: [12, 26]
}
},
/**
* @lends Highcharts.Series.prototype
*/
{
nameBase: 'PPO',
nameComponents: ['periods'],
init: function () {
var args = arguments,
ctx = this;
requiredIndicator.isParentLoaded(
EMA,
'ema',
ctx.type,
function (indicator) {
indicator.prototype.init.apply(ctx, args);
}
);
},
getValues: function (series, params) {
var periods = params.periods,
index = params.index,
PPO = [], // 0- date, 1- Percentage Price Oscillator
xData = [],
yData = [],
periodsOffset,
SPE, // Shorter Period EMA
LPE, // Longer Period EMA
oscillator,
i;
// Check if periods are correct
if (periods.length !== 2 || periods[1] <= periods[0]) {
error(
'Error: "PPO requires two periods. Notice, first period ' +
'should be lower than the second one."'
);
return false;
}
SPE = EMA.prototype.getValues.call(this, series, {
index: index,
period: periods[0]
});
LPE = EMA.prototype.getValues.call(this, series, {
index: index,
period: periods[1]
});
// Check if ema is calculated properly, if not skip
if (!SPE || !LPE) {
return false;
}
periodsOffset = periods[1] - periods[0];
for (i = 0; i < LPE.yData.length; i++) {
oscillator = correctFloat(
(SPE.yData[i + periodsOffset] - LPE.yData[i]) /
LPE.yData[i] *
100
);
PPO.push([LPE.xData[i], oscillator]);
xData.push(LPE.xData[i]);
yData.push(oscillator);
}
return {
values: PPO,
xData: xData,
yData: yData
};
}
}
);
/**
* A `Percentage Price Oscillator` series. If the [type](#series.ppo.type)
* option is not specified, it is inherited from [chart.type](#chart.type).
*
* @extends series,plotOptions.ppo
* @since 7.0.0
* @product highstock
* @excluding allAreas, colorAxis, dataParser, dataURL, joinBy, keys,
* navigatorOptions, pointInterval, pointIntervalUnit,
* pointPlacement, pointRange, pointStart, showInNavigator, stacking
* @apioption series.ppo
*/