IBS-indicator-from-VK-s-Youtube-video

CODE:
using WealthLab.Backtest;
using WealthLab.Core;
using WealthLab.Indicators;

namespace WealthScript1 
{
   //www.quantifiedstrategies.com/internal-bar-strength-ibs-indicator-strategy/
   public class IbsDemo : UserStrategyBase
   {
      IndicatorBase ibs;

      public override void Initialize(BarHistory bars)
      {
         ibs = IBS.Series(bars,1);
         PlotIndicator(ibs);
      }

      public override void Execute(BarHistory bars, int idx)
      {
         if (HasOpenPosition(bars, PositionType.Long))
         {
            //sell conditions below
            if (ibs[idx] > 90.0)
               PlaceTrade(bars, TransactionType.Sell, OrderType.Market, 0.0, "IBS high sell");
         }
         else
         {
            //buy conditions below
            if (ibs[idx] < 10.0)
               PlaceTrade(bars, TransactionType.Buy, OrderType.Market, 0.0, "IBS low buy");      
         }
      }
   }
}