ZScore of Time Segmented Volume ind.

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

namespace cAlgo.Indicators
{
    [Levels(-2.0, 0, 2.0)]
    [Indicator(IsOverlay = false, AutoRescale = false, AccessRights = AccessRights.None)]
    public class mZScore : Indicator
    {
        [Parameter("TSV Main Periods (13)", DefaultValue = 13)]
        public int inpPeriodsMain { get; set; }
        [Parameter("TSV Smooth Periods (7)", DefaultValue = 7)]
        public int inpPeriodsSmooth { get; set; }
        [Parameter("ZScore Periods (20)", DefaultValue = 20)]
        public int inpPeriodsZScore { get; set; }
        [Parameter("e Zscore Smooth Type (sma)", DefaultValue = MovingAverageType.Simple)]
        public MovingAverageType inpSmoothTypeZScore { get; set; }

        [Output("ZScore of Time Segmented Volume", LineColor = "Black", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outZScoreTSV { get; set; }
        
        private IndicatorDataSeries _delta, _segment;
        private MovingAverage _smooth;
        private StandardDeviation _stddev;


        protected override void Initialize()
        {
            _delta = CreateDataSeries();
            _segment = CreateDataSeries();
            _smooth = Indicators.MovingAverage(_segment, inpPeriodsZScore, inpSmoothTypeZScore);
            _stddev = Indicators.StandardDeviation(_segment, inpPeriodsZScore, inpSmoothTypeZScore);
        }

        public override void Calculate(int i)
        {
            _delta[i] = i>1 && Bars.ClosePrices[i] != Bars.ClosePrices[i-1] ? (Bars.ClosePrices[i] - Bars.ClosePrices[i-1]) * Bars.TickVolumes[i] : 0;
            _segment[i] = _delta.Sum(inpPeriodsMain);
            
            outZScoreTSV[i] = (_segment[i] - _smooth.Result[i]) / _stddev.Result[i];
        }
    }
}