How-to-PlaceTrade-the-same-day-inside-Execute-method

I would like to make an overnight strategy by using the daily candles of Norgate.
I check if the close price is above the close price of the previous bar, then I create a long position. At next morning at market openning I would like to sell it.

However: PlaceTrade is executed the next day inside the method "Execute" and not the same day. Unfortunately I have only daily data of Norgate, I can't use 1m data. And performance would be really great if it would work with daily bar data.
Does someone knows how I could solve this problem?

CODE:

using WealthLab.Backtest;
using WealthLab.Core;

namespace WealthScript6
{
   public class MyStrategy : UserStrategyBase
   {
      private TimeSeries close;

      public MyStrategy() : base()
      {
         StartIndex = 1;
         AddParameter("Min. Tagesanstieg [%]", ParameterType.Double, 0.0, 0.0, 5.0, 0.1);
      }

      public override void Initialize(BarHistory bars)
      {
         close = bars.Close;
      }

      public override void Execute(BarHistory bars, int idx)
      {
         double thresholdParam = Parameters[0].AsDouble;
         double threshold = thresholdParam / 100.0;

         if (idx < bars.Count - 1)
         {
            if (close[idx] > close[idx - 1] * (1 + threshold))
            {
// FIXME: Tell him in some way, to execute the trade today, not at next session
               PlaceTrade(bars, TransactionType.Buy, OrderType.MarketClose, 0, 0, "Buy at Close: " + close[idx]);
// Execute next day at morning
               PlaceTrade(bars, TransactionType.Sell, OrderType.Market, 0, 0, "Sell at Next Open");
            }
         }
      }
   }
}