Calculating-52-week-high

CODE:
using WealthLab.Backtest;
using System;
using WealthLab.Core;
using WealthLab.Indicators;
using System.Drawing;
using System.Collections.Generic;

namespace WealthScript2 
{
    public class MyStrategy : UserStrategyBase
    {
        //create indicators and other objects here, this is executed prior to the main trading loop
        public override void Initialize(BarHistory bars)
        {
         TimeSeries dsHigh = Highest.Series(TimeSeriesCompressor.ToWeekly(bars.High), 52);
         dsHigh = TimeSeriesSynchronizer.Synchronize(dsHigh, bars);

         PlotTimeSeriesLine(dsHigh, dsHigh.Description, "Price", Color.Blue, 1, LineStyles.Solid);
        }

        //execute the strategy rules here, this is executed once for each bar in the backtest history
        public override void Execute(BarHistory bars, int idx)
        {
            if (!HasOpenPosition(bars, PositionType.Long))
            {
                //code your buy conditions here
            }
            else
            {
                //code your sell conditions here
            }
        }

        //declare private variables below

    }
}