WyckoffFIR indicator

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

namespace cAlgo
{
    [Levels(0)]
    [Indicator(IsOverlay = false, AutoRescale = false, AccessRights = AccessRights.None)]
    public class mWyckoffFIR : Indicator
    {
        [Output("Wyckoff-FIR", IsHistogram = false, LineColor = "Black", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outWyckoffFIR { get; set; }
        
        private IndicatorDataSeries _firc, _fircc, _wfir;
        

        protected override void Initialize()
        {
            _firc = CreateDataSeries();
            _fircc = CreateDataSeries();
            _wfir = CreateDataSeries();
        }

        public override void Calculate(int i)
        {
            _firc[i] = i>3 ? (Bars.ClosePrices[i] + 2.0 * Bars.ClosePrices[i-1] + 2.0 * Bars.ClosePrices[i-2] + Bars.ClosePrices[i-3]) / 6.0 : Bars.ClosePrices[i];
            _fircc[i] = i>3 ? (_firc[i] + 2.0 * _firc[i-1] + 2.0 * _firc[i-2] + _firc[i-3]) / 6.0 : _firc[i];
            _wfir[i] = _firc[i] - _fircc[i];
            
            outWyckoffFIR[i] = _wfir[i] / Symbol.TickSize;
        }
    }
}