PlotSymbol-equivalent

CODE:

using WealthLab.Backtest;
using WealthLab.Core;
using System.Drawing;

namespace WealthScript1 
{
    public class MyStrategy : UserStrategyBase
    {
        //Initialize
        public override void Initialize(BarHistory bars)
        {
         BarHistory qqq = GetHistory(bars, "QQQ");
         PlotBarHistoryStyle(qqq, "Bars", "Heikin Ashi", Color.Navy);
        }

        //Execute
        public override void Execute(BarHistory bars, int idx)
        {
        }
    }
}