Stochastic for Indicators

using System;
using cAlgo.API;
using cAlgo.API.Internals;
using cAlgo.API.Indicators;
using cAlgo.Indicators;

namespace cAlgo
{
    [Indicator(IsOverlay = false, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class StochasticForIndicators : Indicator
    {
        [Parameter("%K Period", DefaultValue = 9)]
        public int K { get; set; }
        [Parameter("%K Smoothing", DefaultValue = 3)]
        public int Ks { get; set; }
        [Parameter("%K Smoothing Type", DefaultValue = MovingAverageType.Simple)]
        public MovingAverageType Kt { get; set; }
        [Parameter("%D Period", DefaultValue = 9)]
        public int D { get; set; }
        [Parameter("Source")]
        public DataSeries Source { get; set; }

        [Output("%K")]
        public IndicatorDataSeries KLine { get; set; }
        [Output("%D", LineColor = "Red", LineStyle = LineStyle.Lines)]
        public IndicatorDataSeries DLine { get; set; }

        private IndicatorDataSeries Stochastic;
        private MovingAverage Smoothing, Signal;

        protected override void Initialize()
        {
            Stochastic = CreateDataSeries();
            Smoothing = Indicators.MovingAverage(Stochastic, Ks, Kt);
            Signal = Indicators.SimpleMovingAverage(KLine, D);
        }

        public override void Calculate(int index)
        {
            Stochastic[index] = 100 * (Source[index] - Source.Minimum(K)) / (Source.Maximum(K) - Source.Minimum(K));
            KLine[index] = Smoothing.Result[index];
            DLine[index] = Signal.Result[index];
        }
    }
}