Cyclic Component Oscillator

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

namespace cAlgo
{
    [Levels(0)]
    [Indicator(IsOverlay = false, AccessRights = AccessRights.None)]
    public class mCyclicComponentOscillator : Indicator
    {
        [Parameter("Period (20)", DefaultValue = 20, MinValue = 2)]
        public int inpPeriod { get; set; }
        [Parameter("Data Source (close)", DefaultValue = enumPriceTypes.Close)]
        public enumPriceTypes inpPriceType { get; set; }

        [Output("Cyclic Component Oscillator", LineColor = "Black", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outCyclicComponent { get; set; }
        
        private double _alpha;
        private IndicatorDataSeries _price, _hp, _cycliccomponent;
 

        protected override void Initialize()
        {
            _alpha = (1.0 - Math.Sin(2.0 * Math.PI / inpPeriod)) / Math.Cos(2.0 * Math.PI / inpPeriod);
            _price = CreateDataSeries();
            _hp = CreateDataSeries();
            _cycliccomponent = CreateDataSeries();
        }

        public override void Calculate(int i)
        {
            switch(inpPriceType)
            {
                case enumPriceTypes.Open:
                    _price[i] = Bars.OpenPrices[i];
                    break;
                case enumPriceTypes.Close:
                    _price[i] = Bars.ClosePrices[i];
                    break;
                case enumPriceTypes.High:
                    _price[i] = Bars.HighPrices[i];
                    break;
                case enumPriceTypes.Low:
                    _price[i] = Bars.LowPrices[i];
                    break;
                case enumPriceTypes.Median:
                    _price[i] = Bars.MedianPrices[i];
                    break;
                case enumPriceTypes.Typical:
                    _price[i] = Bars.TypicalPrices[i];
                    break;
                case enumPriceTypes.Weighted:
                    _price[i] = Bars.WeightedPrices[i];
                    break;
                default:
                    _price[i] = Bars.ClosePrices[i];
                    break;
            }
            
            _hp[i] = i>1 ? 0.5 * (1.0 + _alpha) * (Bars.ClosePrices[i] - Bars.ClosePrices[i-1]) + _alpha * _hp[i-1] : 0.5 * (1.0 + _alpha) * (Bars.ClosePrices[i] - Bars.TypicalPrices[i]);
            _cycliccomponent[i] = i>3 ? (_hp[i] + 2.0 * _hp[i-1] + 2.0 * _hp[i-2] + _hp[i-3]) / 6.0 : _hp[i];
            
            outCyclicComponent[i] = _cycliccomponent[i];
        }
    }

    public enum enumPriceTypes
    {
        Open,
        Close,
        High,
        Low,
        Median,
        Typical,
        Weighted
    }
}