Momentum Average Levels indicator

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

namespace cAlgo
{
    [Cloud("Shade", "Shade0", FirstColor = "Green", SecondColor = "Red", Opacity = 0.1)]
    [Indicator(AccessRights = AccessRights.None)]
    public class mMomentumAverage : Indicator
    {
        [Parameter("Momentum Period (21)", DefaultValue = 21)]
        public int inpPeriodMomentum { get; set; }
        [Parameter("Average Period (10)", DefaultValue = 10)]
        public int inpPeriodAvgerage { get; set; }
        [Parameter("Average Smooth Type (sma)", DefaultValue = MovingAverageType.Exponential)]
        public MovingAverageType inpAverageSmoothType { get; set; }
        [Parameter("Level Period (10)", DefaultValue = 10)]
        public int inpPeriodLevel { get; set; }

        [Output("Momentum", LineColor = "Black", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outMom { get; set; }
        [Output("LevelUp", LineColor = "Green", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outMomLevelUp { get; set; }
        [Output("LevelDown", LineColor = "Red", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outMomLevelDown { get; set; }
        [Output("Shade", LineColor = "Transparent", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outShade { get; set; }
        [Output("Shade0", LineColor = "Transparent", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outShade0 { get; set; }
        
        private double _alpha;
        private MovingAverage _average;
        private MomentumOscillator _momentum;
        private IndicatorDataSeries _mom, _levelup, _leveldn;
        
        
        protected override void Initialize()
        {
            _alpha = 2.0 / (1.0 + inpPeriodLevel);
            _average = Indicators.MovingAverage(Bars.ClosePrices, inpPeriodAvgerage, inpAverageSmoothType);
            _momentum = Indicators.MomentumOscillator(_average.Result, inpPeriodMomentum);
            _mom = CreateDataSeries();
            _levelup = CreateDataSeries();
            _leveldn = CreateDataSeries();
        }

        public override void Calculate(int i)
        {
            _mom[i] = i>inpPeriodMomentum ? _momentum.Result[i] : 100;
            _levelup[i]  = i>inpPeriodMomentum ? (_mom[i] < _leveldn[i-1]) ? _levelup[i-1] : _levelup[i-1] + _alpha * (_mom[i] - _levelup[i-1]) : _mom[i];
            _leveldn[i]  = i>inpPeriodMomentum ? (_mom[i] > _levelup[i-1]) ? _leveldn[i-1] : _leveldn[i-1] + _alpha * (_mom[i] - _leveldn[i-1]) : _mom[i];
        
            outMom[i] = _mom[i];
            outMomLevelUp[i] = _levelup[i];
            outMomLevelDown[i] = _leveldn[i];
            outShade[i] = _mom[i] > _levelup[i] || _mom[i] < _leveldn[i] ? _mom[i] : 100.0;
            outShade0[i] = _mom[i] > _levelup[i] ? _levelup[i] : _mom[i] < _leveldn[i] ? _leveldn[i] : 100.0;
        }
    }
}