Custom Period Separator

using System;
using cAlgo.API;

namespace cAlgo
{
    [Indicator(IsOverlay = true, AutoRescale = false, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class CustomPeriodSeparator : Indicator
    {
        [Parameter(DefaultValue = 60)]
        public int Minutes { get; set; }

        [Output("Separator", PlotType = PlotType.Histogram)]
        public IndicatorDataSeries Separator { get; set; }

        private IndicatorDataSeries totalMinutes;
        private double lastSeparatorMinutes;

        protected override void Initialize()
        {
            totalMinutes = CreateDataSeries();
            lastSeparatorMinutes = TotalMinutes(MarketSeries.OpenTime[0]);
            lastSeparatorMinutes -= lastSeparatorMinutes % Minutes;
        }

        public override void Calculate(int index)
        {
            totalMinutes[index] = TotalMinutes(MarketSeries.OpenTime[index]);

            if (totalMinutes[index] >= lastSeparatorMinutes + Minutes)
            {
                lastSeparatorMinutes = totalMinutes[index];
                lastSeparatorMinutes -= lastSeparatorMinutes % Minutes;
                Separator[index] = MarketSeries.High.Maximum(MarketSeries.Open.Count) * 1.2;
            }

            if (MarketSeries.OpenTime[index].Day != MarketSeries.OpenTime[index - 1].Day)
            {
                lastSeparatorMinutes = 0;
                Separator[index] = MarketSeries.High.Maximum(MarketSeries.Open.Count) * 1.2;
            }
        }

        private double TotalMinutes(DateTime dt)
        {
            var delta = dt.Ticks % TimeSpan.FromMinutes(1).Ticks;
            var dateTime = new DateTime(dt.Ticks - delta, dt.Kind);
            return dateTime.Subtract(dateTime.Date).TotalMinutes;
        }
    }
}