Wildhog indicator

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

namespace cAlgo
{
    [Levels(30,70,50)]
    [Indicator(IsOverlay = false, AccessRights = AccessRights.None)]
    public class mWildhog : Indicator
    {
        [Parameter("Period (8)", DefaultValue = 8, MinValue = 2)]
        public int inpPeriod { get; set; }

        [Output("Wildhog Oscillator", LineColor = "Black", PlotType = PlotType.Line, Thickness = 1)]
        public IndicatorDataSeries outWoldhog { get; set; }
        
        private IndicatorDataSeries _hh, _ll, _delta, _woldhog;
        

        protected override void Initialize()
        {
            _hh = CreateDataSeries();
            _ll = CreateDataSeries();
            _delta = CreateDataSeries();
            _woldhog = CreateDataSeries();
        }

        public override void Calculate(int i)
        {
            _hh[i] = i>inpPeriod ? Bars.HighPrices.Maximum(inpPeriod) : Bars.HighPrices[i];
            _ll[i] = i>inpPeriod ? Bars.LowPrices.Minimum(inpPeriod) : Bars.LowPrices[i];
            _delta[i] = _hh[i] - _ll[i];
            _woldhog[i] = i>1 
                        ? 100.0 * (Bars.ClosePrices[i] - _ll[i]) / (3.0 * _delta[i]) + _woldhog[i-1] / 1.5
                        : 100.0 * (Bars.ClosePrices[i] - _ll[i]) / (3.0 * _delta[i]);
            
            outWoldhog[i] = _woldhog[i];
        }
    }
}