Runtime error "Value cannot be null" when accessing external symbol on Weekly/Monthly

Author: WEALTHPRO25

Creation Date: 12/12/2017 10:26 PM

Wealth Lab » WealthScript (.NET) » Runtime error "Value cannot be null" when accessing external symbol on Weekly/Monthly

WEALTHPRO25

12/12/2017 10:26 PM

i have attached at file that shows the error, this code works on daily chart but not on weekly or monthly chart, it use to work on weekly and monthly chart and suddenly it gives me an error

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i have attached at file that shows the error, this code works on daily chart but not on weekly or monthly chart, it use to work on weekly and monthly chart and suddenly it gives me an error

[code]using System;
using System.Drawing;
using WealthLab;
using WealthLab.Indicators;
using TASCIndicators;
using Community.Indicators;

namespace WealthLab.Strategies
{
   public class ReversingMACDSequel : WealthScript
   {
      protected override void Execute()
      {  
         //Bars b1 = GetExternalSymbol, "GOLDAMGBD228NLBM", true );
         Bars b1 = GetExternalSymbol("GOLDAMGBD228NLBM", true );
         DataSeries ds1 = b1.Close;
         
         //Bars b2   = GetExternalSymbol, "^DJI", true);
         Bars b2   = GetExternalSymbol("^DJI", true);
         DataSeries ds2 = b2.Close;
         
         DataSeries dsDivision = ds2*100/ds1;
         
         
         HideVolume();
         
         
         PlotSeries(PricePane, dsDivision, Color.Green, LineStyle.Solid,2);

// Reversing MACD
         HideVolume();
         RevEngMACDSignal r = RevEngMACDSignal.Series( dsDivision,12,26,9,false );
         PlotSeries( PricePane, r, Color.Blue, LineStyle.Dashed, 2 );

// MACD and MACD signal
         DataSeries macd = MACD.Series( dsDivision );
         DataSeries macdSignal = MACDEx_Signal3.Series( dsDivision,12,26,9 );
         DataSeries macdHist = MACDEx_Histogram.Series( dsDivision,12,26 );
         ChartPane MACDPane = CreatePane( 50, true, true );
         PlotSeries( MACDPane, macd, Color.Blue, LineStyle.Solid, 2 );
         PlotSeries( MACDPane, macdSignal, Color.Red, LineStyle.Solid, 2 );
         PlotSeries( MACDPane, macdHist, Color.Teal, LineStyle.Histogram, 2 );
         
         
      }
   }
}[/code]