Reverse-into-short-position-at-market-close

Hello,

I'm testing an strategy using the C# Editor, however, since I'm not proficient in this language, could you guys help me find what's missing in the code?

My strategy basically looks for price closing above the SMA high to buy at market close and closing below the SMA low to sell short at market close.

At the same time, it needs to close the previous position. I tested using the building blocks but couldn't achieve this result.

Here's the code:

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


namespace WealthScript10 
{
    public class MyStrategy : UserStrategyBase
    {
       public MyStrategy() : base()
        {
         AddParameter("Period", ParameterTypes.Int32, 20, 3, 100, 1);

        }

        public override void Initialize(BarHistory bars)
        {
         src = bars.Close;
         smaHigh = new SMA(bars.High,Parameters[0].AsInt);
         PlotIndicator(smaHigh,Color.FromArgb(255,255,0,0));
         smaLow = new SMA(bars.Low,Parameters[0].AsInt);
         PlotIndicator(smaLow,Color.FromArgb(255,0,128,0));
         StartIndex = Parameters[0].AsInt;
        }

        public override void Execute(BarHistory bars, int idx)
        {
         int index = idx;
         Position foundPosition0 = FindOpenPosition(0);
         bool buyCondition;
         
         if (foundPosition0 == null)
         {
            buyCondition = false;
            {
               if (src.CrossesOver(smaHigh, index))
               {
                  buyCondition = true;
               }               
            }
            if (buyCondition)
            {
               _transaction = PlaceTrade(bars, TransactionType.Buy, OrderType.MarketClose, 0, 0, "Buy At Market (1)");
            }         
         }
         else
         {
            {
               if (src.CrossesUnder(smaLow, index))
               {
                  ClosePosition(foundPosition0, OrderType.MarketClose, 0, "Sell At Market (1)");
               }
            }
         }

         Position foundPosition1 = FindOpenPosition(1);
         bool sellCondition;

         if (foundPosition1 == null)
         {
            sellCondition = false;
            {
               if (src.CrossesUnder(smaLow, index))
               {
                  sellCondition = true;
               }
            }
            if (sellCondition)
            {
               _transaction = PlaceTrade(bars, TransactionType.Sell, OrderType.MarketClose, 0, 1, "Sell Short At Market (2)");
            }
         }
         else
         {
            {
               if (src.CrossesOver(smaHigh, index))
               {
                  ClosePosition(foundPosition1, OrderType.MarketClose, 0, "Buy to Cover At Market (2)");
               }
            }
         }           

        }

      private TimeSeries src;
      private IndicatorBase smaHigh;
      private IndicatorBase smaLow;
      private Transaction _transaction;
    }
}