How-to-get-options-symbol-for-SPX-XO

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

namespace WealthScript1 
{
    public class MyStrategy : UserStrategyBase
    {
         BarHistory _osyn;       // the option's BarHistory
        //create indicators and other objects here, this is executed prior to the main trading loop
        public override void Initialize(BarHistory bars)
        {
         //estimate a varying IV using a factor of HV
         string symbol = OptionSynthetic.GetOptionsSymbol(bars, OptionType.Call, bars.LastValue, bars.DateTimes[bars.Count - 1], 5);
         string c2sym = OptionsHelper.C2Symbol(symbol);

         //show the symbols
         DrawHeaderText($"Synthetic symbol is {symbol}", WLColor.Gold, 12, "Price");
         DrawHeaderText($"C2 symbol is {c2sym}", WLColor.Gold, 12, "Price");
         
        }

        //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

    }
}