OrderType-MarketClose-on-S-P-100-bogus-Metrics-Report-and-empty-Equity-Curve

CODE:
namespace WealthScript1 
{
    public class MyStrategy : UserStrategyBase
    {        
        public override void Execute(BarHistory bars, int idx)
        {
         foreach (var pos in OpenPositions)
         {
            if (idx - pos.EntryBar > 2)
            {
               // ClosePosition(pos, OrderType.Market, 0.0, "Timeout"); // works
               ClosePosition(pos, OrderType.MarketClose, 0.0, "MarketClose"); // nope
               // ClosePosition(pos, OrderType.LimitClose, bars.Low[idx], "LimitClose"); // works
            }
         }
           double limit = bars.Close[idx] * 0.98;         
         Transaction tr = PlaceTrade(bars, TransactionType.Buy, OrderType.Limit, limit, "Limit");
        }
    }
}