public static List <decimal?> Sar(this IEnumerable <ICandle> candles, double?accelerationFactor = null, double?maximumAccelerationFactor = null) { accelerationFactor = accelerationFactor ?? 0.02; maximumAccelerationFactor = maximumAccelerationFactor ?? 0.2; IIndicatorOptions options = new SarOptions(accelerationFactor.Value, maximumAccelerationFactor.Value); Sar sar = new Sar(); return(sar.Get(candles, options)); }