Previous-day-close-percent-in-a-strategy

CODE:
using WealthLab.Core;
using System;
using System.Drawing;
using WealthLab.Indicators; 

namespace WealthLab.MyIndicators1
{
    public class PercentFromYesterdayClose : IndicatorBase
    {
        //parameterless constructor
        public PercentFromYesterdayClose() : base()
        {
        }

        //for code based construction
        public PercentFromYesterdayClose(BarHistory source)
            : base()
        {
         Parameters[0].Value = source;

            Populate();
        }

      //static Series method
      public static PercentFromYesterdayClose Series(BarHistory source)
      {
         return new PercentFromYesterdayClose(source);
      }

        //name
        public override string Name
        {
            get
            {
                return "PercentFromYesterdayClose";
            }
        }

        //abbreviation
        public override string Abbreviation
        {
            get
            {
                return "PercentFromYesterdayClose";
            }
        }

        //description
        public override string HelpDescription
        {
            get
            {
            return @"Returns the percent change from yesterday's last price for an intraday chart.  Use Pre/Post Filter to get yesterday's close";
            }
        }

        //price pane
        public override string PaneTag
        {
            get
            {
                return "PercentFromYesterdayClose";
            }
        }

      //default color
      public override WLColor DefaultColor
      {
         get
         {
            return WLColor.FromArgb(255,0,0,255);
         }
      }

      //default plot style
      public override PlotStyle DefaultPlotStyle
      {
         get
         {
            return PlotStyle.Line;
         }
      }

        //populate
        public override void Populate()
        {
         BarHistory source = Parameters[0].AsBarHistory;
            DateTimes = source.Close.DateTimes;

         BarHistory dailybars = BarHistoryCompressor.ToDaily(source); 
         dailybars = BarHistorySynchronizer.Synchronize(dailybars, source);
            
         for (int n = 1; n < source.Close.Count; n++)
         {
            double yestClose = dailybars.Close[n];
            if (source.IsLastBarOfDay(n))
            {
               // use the value from the previous bar in order to show the Close to Close percent. Otherwise this would be zero.
               yestClose = dailybars.Close[n - 1]; 
            }
            
                Values[n] = 100 * ( source.Close[n] / yestClose - 1 );
         }
        }

        //generate parameters
        protected override void GenerateParameters()
        {
         AddParameter("Source", ParameterType.BarHistory, null);

        }
    }
}