highcharts
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JavaScript charting framework
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JavaScript
/* *
*
* License: www.highcharts.com/license
*
* !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
*
* */
;
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
import RequiredIndicatorMixin from '../../../Mixins/IndicatorRequired.js';
import SeriesRegistry from '../../../Core/Series/SeriesRegistry.js';
var EMAIndicator = SeriesRegistry.seriesTypes.ema;
import U from '../../../Core/Utilities.js';
var correctFloat = U.correctFloat, isArray = U.isArray, merge = U.merge;
/**
* The TEMA series type.
*
* @private
* @class
* @name Highcharts.seriesTypes.tema
*
* @augments Highcharts.Series
*/
var TEMAIndicator = /** @class */ (function (_super) {
__extends(TEMAIndicator, _super);
function TEMAIndicator() {
var _this = _super !== null && _super.apply(this, arguments) || this;
_this.EMApercent = void 0;
_this.data = void 0;
_this.options = void 0;
_this.points = void 0;
return _this;
}
TEMAIndicator.prototype.init = function () {
var args = arguments, ctx = this;
RequiredIndicatorMixin.isParentLoaded(EMAIndicator, 'ema', ctx.type, function (indicator) {
indicator.prototype.init.apply(ctx, args);
return;
});
};
TEMAIndicator.prototype.getEMA = function (yVal, prevEMA, SMA, index, i, xVal) {
return EMAIndicator.prototype.calculateEma(xVal || [], yVal, typeof i === 'undefined' ? 1 : i, this.EMApercent, prevEMA, typeof index === 'undefined' ? -1 : index, SMA);
};
TEMAIndicator.prototype.getTemaPoint = function (xVal, tripledPeriod, EMAlevels, i) {
var TEMAPoint = [
xVal[i - 3],
correctFloat(3 * EMAlevels.level1 -
3 * EMAlevels.level2 + EMAlevels.level3)
];
return TEMAPoint;
};
TEMAIndicator.prototype.getValues = function (series, params) {
var period = params.period, doubledPeriod = 2 * period, tripledPeriod = 3 * period, xVal = series.xData, yVal = series.yData, yValLen = yVal ? yVal.length : 0, index = -1, accumulatePeriodPoints = 0, SMA = 0, TEMA = [], xDataTema = [], yDataTema = [],
// EMA of previous point
prevEMA, prevEMAlevel2,
// EMA values array
EMAvalues = [], EMAlevel2values = [], i, TEMAPoint,
// This object contains all EMA EMAlevels calculated like below
// EMA = level1
// EMA(EMA) = level2,
// EMA(EMA(EMA)) = level3,
EMAlevels = {};
this.EMApercent = (2 / (period + 1));
// Check period, if bigger than EMA points length, skip
if (yValLen < 3 * period - 2) {
return;
}
// Switch index for OHLC / Candlestick / Arearange
if (isArray(yVal[0])) {
index = params.index ? params.index : 0;
}
// Accumulate first N-points
accumulatePeriodPoints =
EMAIndicator.prototype.accumulatePeriodPoints(period, index, yVal);
// first point
SMA = accumulatePeriodPoints / period;
accumulatePeriodPoints = 0;
// Calculate value one-by-one for each period in visible data
for (i = period; i < yValLen + 3; i++) {
if (i < yValLen + 1) {
EMAlevels.level1 = this.getEMA(yVal, prevEMA, SMA, index, i)[1];
EMAvalues.push(EMAlevels.level1);
}
prevEMA = EMAlevels.level1;
// Summing first period points for ema(ema)
if (i < doubledPeriod) {
accumulatePeriodPoints += EMAlevels.level1;
}
else {
// Calculate dema
// First dema point
if (i === doubledPeriod) {
SMA = accumulatePeriodPoints / period;
accumulatePeriodPoints = 0;
}
EMAlevels.level1 = EMAvalues[i - period - 1];
EMAlevels.level2 = this.getEMA([EMAlevels.level1], prevEMAlevel2, SMA)[1];
EMAlevel2values.push(EMAlevels.level2);
prevEMAlevel2 = EMAlevels.level2;
// Summing first period points for ema(ema(ema))
if (i < tripledPeriod) {
accumulatePeriodPoints += EMAlevels.level2;
}
else {
// Calculate tema
// First tema point
if (i === tripledPeriod) {
SMA = accumulatePeriodPoints / period;
}
if (i === yValLen + 1) {
// Calculate the last ema and emaEMA points
EMAlevels.level1 = EMAvalues[i - period - 1];
EMAlevels.level2 = this.getEMA([EMAlevels.level1], prevEMAlevel2, SMA)[1];
EMAlevel2values.push(EMAlevels.level2);
}
EMAlevels.level1 = EMAvalues[i - period - 2];
EMAlevels.level2 = EMAlevel2values[i - 2 * period - 1];
EMAlevels.level3 = this.getEMA([EMAlevels.level2], EMAlevels.prevLevel3, SMA)[1];
TEMAPoint = this.getTemaPoint(xVal, tripledPeriod, EMAlevels, i);
// Make sure that point exists (for TRIX oscillator)
if (TEMAPoint) {
TEMA.push(TEMAPoint);
xDataTema.push(TEMAPoint[0]);
yDataTema.push(TEMAPoint[1]);
}
EMAlevels.prevLevel3 = EMAlevels.level3;
}
}
}
return {
values: TEMA,
xData: xDataTema,
yData: yDataTema
};
};
/**
* Triple exponential moving average (TEMA) indicator. This series requires
* `linkedTo` option to be set and should be loaded after the
* `stock/indicators/indicators.js` and `stock/indicators/ema.js`.
*
* @sample {highstock} stock/indicators/tema
* TEMA indicator
*
* @extends plotOptions.ema
* @since 7.0.0
* @product highstock
* @excluding allAreas, colorAxis, compare, compareBase, joinBy, keys,
* navigatorOptions, pointInterval, pointIntervalUnit,
* pointPlacement, pointRange, pointStart, showInNavigator,
* stacking
* @requires stock/indicators/indicators
* @requires stock/indicators/ema
* @requires stock/indicators/tema
* @optionparent plotOptions.tema
*/
TEMAIndicator.defaultOptions = merge(EMAIndicator.defaultOptions);
return TEMAIndicator;
}(EMAIndicator));
SeriesRegistry.registerSeriesType('tema', TEMAIndicator);
/* *
*
* Default Export
*
* */
export default TEMAIndicator;
/**
* A `TEMA` series. If the [type](#series.ema.type) option is not
* specified, it is inherited from [chart.type](#chart.type).
*
* @extends series,plotOptions.ema
* @since 7.0.0
* @product highstock
* @excluding allAreas, colorAxis, compare, compareBase, dataParser, dataURL,
* joinBy, keys, navigatorOptions, pointInterval, pointIntervalUnit,
* pointPlacement, pointRange, pointStart, showInNavigator, stacking
* @requires stock/indicators/indicators
* @requires stock/indicators/ema
* @requires stock/indicators/tema
* @apioption series.tema
*/
''; // to include the above in the js output