Partial-Exit-Block

CODE:

using WealthLab.Backtest;
using System;
using WealthLab.Core;
using WealthLab.Indicators;
using System.Collections.Generic;

namespace WealthScript1 
{
    public class MyStrategy : UserStrategyBase
    {
        //create indicators and other objects here, this is executed prior to the main trading loop
        public override void Initialize(BarHistory bars)
        {
         sma20 = SMA.Series(bars.Close, 20);
         sma50 = SMA.Series(bars.Close, 50);
         PlotIndicator(sma20, WLColor.Blue);
         PlotIndicator(sma50, WLColor.Red);
        }

        //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
            if (bars.Close[idx] < sma20[idx] && bars.Close[idx] < sma50[idx] && bars.Close.TurnsUp(idx))
            {
               PlaceTrade(bars, TransactionType.Buy, OrderType.Market);
               sold20 = false;
               sold50 = false;
            }
            }
            else
            {
                //code your sell conditions here
                 if (bars.Close[idx] > sma20[idx] && bars.Close[idx] > sma50[idx])
               PlaceTrade(bars, TransactionType.Sell, OrderType.Market);
               else if (bars.Close[idx] > sma20[idx] && !sold20)
            {
               Transaction t = PlaceTrade(bars, TransactionType.Sell, OrderType.Market);
               sold20 = true;
               if (!sold50)
                  t.Quantity /= 2;
            }
               else if (bars.Close[idx] > sma50[idx] && !sold50)
            {
               Transaction t = PlaceTrade(bars, TransactionType.Sell, OrderType.Market);
               sold50 = true;
               if (!sold20)
                  t.Quantity /= 2;
            }
            }
        }

      //declare private variables below
      private SMA sma20;
      private SMA sma50;
      private bool sold20 = false;
      private bool sold50 = false;
    }
}