public int getRequiredHistorySize() {
   if (this.function == Function.EMA) {
     Core core = new Core();
     int lookback = core.emaLookback(day);
     return ((lookback + 1) << 2);
   } else if (function == Function.RSI) {
     Core core = new Core();
     int lookback = core.rsiLookback(day);
     return ((lookback + 1) << 2);
   } else if (this.function == Function.MFI) {
     Core core = new Core();
     int lookback = core.mfiLookback(day);
     return ((lookback + 1) << 2);
   } else if (this.function == Function.MACD) {
     Core core = new Core();
     int lookback = core.macdFixLookback(day);
     return ((lookback + 1) << 2);
   } else if (this.function == Function.MACDSignal) {
     Core core = new Core();
     int lookback = core.macdFixLookback(day);
     return ((lookback + 1) << 2);
   } else if (this.function == Function.MACDHist) {
     Core core = new Core();
     int lookback = core.macdFixLookback(day);
     return ((lookback + 1) << 2);
   } else {
     return day;
   }
 }
Ejemplo n.º 2
0
 public static Double createEMA(java.util.List<Double> values, int period) {
   if (period <= 0) {
     throw new IllegalArgumentException("period must be greater than 0");
   }
   final int size = values.size();
   final Core core = new Core();
   final int allocationSize = size - core.emaLookback(period);
   if (allocationSize <= 0) {
     return null;
   }
   final double[] output = new double[allocationSize];
   final MInteger outBegIdx = new MInteger();
   final MInteger outNbElement = new MInteger();
   double[] _values = ArrayUtils.toPrimitive(values.toArray(new Double[0]));
   core.ema(0, values.size() - 1, _values, period, outBegIdx, outNbElement, output);
   return output[outNbElement.value - 1];
 }