[BOT] Neue Klasse für Indikator berechnungen eingeführt

src/js/tradingbot/util/AssetInstrumentCalculator.js

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+import AggregatedDataPoint from "../data/asset/AggregatedDataPoint";
+
+export default class AssetInstrumentCalculator{
+
+    /**
+     * Calculate simple moving average
+     * 
+     * Formula: SMA = (A1 + A2 + ……….An) / n
+     * 
+     * @param {AggregatedDataPoint[]} dataPoints 
+     * @returns {number}
+     */
+    static calculateSMA(dataPoints) {
+        return dataPoints.map(dp => dp.avgPrice).reduce((a, b) => a+b, 0) / dataPoints.length;
+    }
+
+    /**
+     * Calculate exponential moving average
+     * 
+     * Formula: EMA = [Closing Price – EMA (Previous Time Period)] x Multiplier + EMA (Previous Time Period)
+     * 
+     * SMA is taken as EMA of previous period; Multiplier ist 2/(n+1)
+     * 
+     * @param {AggregatedDataPoint[]} dataPoints 
+     * @returns {number}
+     */
+    static caclulateEMA(dataPoints) {
+        const sma = AssetInstrumentCalculator.calculateSMA(dataPoints);
+        const multiplier = 2 / (dataPoints.length + 1);
+
+        return sma * (1 - multiplier) + dataPoints[dataPoints.length - 1] * multiplier;
+    }
+}