CandleMethods-don-t-work-on-the-whole-data

CODE:
    public class MyStrategy : UserStrategyBase
    {
       public MyStrategy() : base()
        {
            StartIndex = 0;
        }

        public override void Initialize(BarHistory bars)
        {
        }

        public override void Execute(BarHistory bars, int idx)
        {
         if (CandleMethods.LongUpperShadow(bars, idx))
            DrawBarAnnotation("L", idx, true, WLColor.Black, 10);
         if (CandleMethods.LongLowerShadow(bars, idx))
            DrawBarAnnotation("L", idx, false, WLColor.Black, 10);
         if (CandleMethods.NoUpperShadow(bars, idx))
            DrawBarAnnotation("N", idx, true, WLColor.Red, 10);
         if (CandleMethods.NoLowerShadow(bars, idx))
            DrawBarAnnotation("N", idx, false, WLColor.Red, 10);
        }
    }