VWAP Lead/Lag Indicator

using System;
using cAlgo.API;
using cAlgo.API.Internals;
using cAlgo.API.Indicators;
using cAlgo.Indicators;
  
namespace cAlgo
{
    [Levels(0)]
    [Indicator(IsOverlay = false, AccessRights = AccessRights.None)]
    public class mVWAPleadlag : Indicator
    {
        [Parameter("Periods (10)", DefaultValue = 10)]
        public int inpPeriods { get; set; }
  
        [Output("VWAP Lead/Lag", LineColor = "Black", LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outVWAPll { get; set; }

        private IndicatorDataSeries _vwapmul, _vwapclose, _mul, _lead, _lag;

  
        protected override void Initialize()
        {
            _vwapmul = CreateDataSeries();
            _vwapclose = CreateDataSeries();
            _mul = CreateDataSeries();
            _lead = CreateDataSeries();
            _lag = CreateDataSeries();
        }
  
        public override void Calculate(int i)
        {
            _mul[i] = Bars.ClosePrices[i] * Bars.ClosePrices[i];
            _vwapmul[i] = ((_mul.Sum(inpPeriods) * Bars.TickVolumes.Sum(inpPeriods)) / Bars.TickVolumes.Sum(inpPeriods)) / inpPeriods;
            _vwapclose[i] = ((Bars.ClosePrices.Sum(inpPeriods) * Bars.TickVolumes.Sum(inpPeriods)) / Bars.TickVolumes.Sum(inpPeriods)) / inpPeriods;
            _lead[i] = _vwapmul[i] / _vwapclose[i];
            _lag[i] = ((Bars.TypicalPrices.Sum(inpPeriods) * Bars.TickVolumes.Sum(inpPeriods)) / Bars.TickVolumes.Sum(inpPeriods)) / inpPeriods;
            
            outVWAPll[i] =  _lead[i] - _lag[i];
        }
    }
}