Object reference not set to an instance of an object

Author: deepbuyer

Creation Date: 9/13/2008 5:44 PM

Wealth Lab » WealthScript (.NET) » Object reference not set to an instance of an object

deepbuyer

9/13/2008 5:44 PM

I posted this in old thread on WL4, moving it to WL5 forum where it belongs.

limiting a similar script by date gives "Object reference not set to an instance of an object". If I comment out //if (Bars.Date[bar] >= date1) and //if (Bars.Date[bar]<=date2) then the error goes away (but i don't limit by date of course).

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I posted this in old thread on WL4, moving it to WL5 forum where it belongs.

limiting a similar script by date gives "Object reference not set to an instance of an object". If I comment out //if (Bars.Date[bar] >= date1) and	//if (Bars.Date[bar]<=date2) then the error goes away (but i don't limit by date of course).

[CODE]using System;
    using System.Collections.Generic;
    using System.Text;
	using System.IO;
    using WealthLab;
    using WealthLab.Indicators;
    using System.Drawing;
using WealthLab.Rules;

namespace WealthLab.Strategies
{
	public class MyStrategy : WealthScript
	{
		// Writes trades into CSV file
		void WriteTrades( string path )
		{
			StreamWriter trades;
			string s = ";";
			
			if( Positions.Count > 0 )
			{
				trades = new StreamWriter( path, true );

foreach( Position p in Positions )
					//	if ( !p.Active )
				{
					trades.Write(p.EntryDate.ToShortDateString() + s + p.Bars.Symbol + s + p.Tag + "\r\n" );
				}
				trades.Close();
			}					
		}

DateTime date1 = new DateTime(2007, 1, 1);
		DateTime date2 = new DateTime(2007, 3, 1);
		
		protected override void Execute()
		{

DataSeries dsRatio = FundamentalsRatio.MarketCapSeries( this );
			dsRatio.Description = "Market Capitalization (ttm)";

for(int bar = 6; bar <= Bars.Count-1; bar++)
			{
				if (IsLastPositionActive)
				{

SellAtClose( bar, Position.AllPositions, "exit" );
				}
				else
				{
//Problem is here
					if (Bars.Date[bar] >= date1)
					if (Bars.Date[bar] <= date2)
						{	BuyAtMarket( bar+1);
						}	
					// Store indicator data in the position's tag property
					LastPosition.Tag = 
						Bars.FormatValue( ROC.Series( Close, 5 )[bar] );
					
				}
			}
	
			// specify path
			string path = @"C:\Trades.csv";
			WriteTrades( path );

}
	}
}[/CODE]