Current Equity Level - Wealth Lab Forum

dansmo

#1

3/1/2010 7:04 AM

How do I get the current level of equity?
In WL4 I used this:

QUOTE:
Equity(BarCount-1)

I already had a look at the WL5 Wiki atricle on "Interacting dynamically with Portfolio level equity". However, this was quite confusing to me, as I only need this on figure!

Getting the current level of equity is not supported in WL5. Otherwise it would be documented in the QuickRef and I wouldn't have to create this workaround. But you can still give the Wiki article a go, these examples are quite illustrative and simple:

CODE:
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Eugene

#3

3/1/2010 7:17 AM

But if you were used to access the portfolio equity in simuscripts i.e. "Equity(BarCount-1)", this is still quite easily possible in WL5 using PosSizers. Although the API documentation is currently unaccessible, this will be supported and requires no programming tricks (e.g. Trading the Equity Curve PosSizer).

dansmo

#4

3/1/2010 7:29 AM

QUOTE:

DataSeries globalEquity = sr.EquityCurve;...PlotSeries( gEqPane, globalEquity, Color.DarkGreen, LineStyle.Histogram, 2 );

I dont understand where "sr" is coming from.

Eugene

#5

3/1/2010 7:33 AM

You don't have to, it's an "programming trick" from Community.Components' Utility.cs that uses some undocumented (unsupported) classes. Try using the data series as a regular data series:

CODE:
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dansmo

#6

3/1/2010 7:40 AM

Sorry, I dont get it. Next trades size should depend on current equity.

CODE:
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Eugene

#7

3/1/2010 7:51 AM

In this case, you should use "bar", and not "Bars.Count-1". The latter syntax is for finding the equity value on the last bar outside of the trading loop.

dansmo

#8

3/1/2010 7:59 AM

"Tne name'globalEquity' does not exist in the current context."

Sorry, I meant "The name 'sr' dpes not exist...".

Eugene

#9

3/1/2010 8:12 AM

Right, it doesn't - because you have arbitrarily removed many necessary lines of code from the Wiki example.

dansmo

#10

3/1/2010 8:29 AM

Like I said. I do not understand it. Now, I added some lines. But still does not work.
"Object referencet not set to an instace of an object.
at WealthLab.Strategies.MyStrategies.Execute()
at Community.Components.Utility.runDonor

CODE:
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Size:

Color:

Like I said. I do not understand it. Now, I added some lines. But still does not work.
"Object referencet not set to an instace of an object.
 at WealthLab.Strategies.MyStrategies.Execute()
 at Community.Components.Utility.runDonor
[CODE]
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using WealthLab;
using WealthLab.Indicators;
using Community.Components;

namespace WealthLab.Strategies
{
	public class MyStrategy : WealthScript
	{
		
		protected override void Execute()
		{
			
			//Equity Curve=============================================================
			Utility u = new Utility(this);
			string firstRun = ""; string results = "";
			SetGlobal( firstRun, Bars.Symbol );			
			if( (string)GetGlobal( firstRun ) == DataSetSymbols[0] ) 
			{
				RemoveGlobal( results + "_PerformanceResults" );
				
				/* Option 1: run a strategy on-the-fly (see the "Donor" class below) */
				SystemPerformance sp = u.runDonor( new Donor() );
				
				SetGlobal( results + "_PerformanceResults", sp.Results );
			}			
			
			/* Retrieve and plot the portfolio equity from Wealth-Lab's global memory */
			
			SystemResults sr = (SystemResults)GetGlobal( results + "_PerformanceResults" );
			DataSeries globalEquity = sr.EquityCurve; globalEquity.Description = "Donor system Portfolio Equity";
			globalEquity = Synchronize( globalEquity );
			ChartPane gEqPane = CreatePane( 40, false, true );
			PlotSeries( gEqPane, globalEquity, Color.DarkGreen, LineStyle.Histogram, 2 );
			//==========================================================================
			
			for(int bar = 20; bar < Bars.Count; bar++)
			{
				if (IsLastPositionActive)
				{
					//code your exit rules here
				}
				else
				{
					int numShares = (int)(globalEquity[bar] * 0.05 / Bars.Close[bar]);
					BuyAtMarket(bar,"Test");
				}
			}
		}
	}
	
	
	// Your optional "donor" strategy 
	public class Donor : WealthScript
	{
		protected override void Execute()
		{
			for(int bar = 21; bar < Bars.Count; bar++)
			{
				if (IsLastPositionActive)
				{

}
				else
				{
					
				}
			}
		}
	}
	
}
[/CODE]

Eugene

#11

3/1/2010 8:42 AM

The code runs fine, it just wouldn't produce any results because its "donor system" code is missing, so the equity is 0 at all times:

CODE:
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P.S. Another forum thread to look for the hints: Save Equity Curve Data

dansmo

#12

3/1/2010 8:51 AM

There is a donor code at the end. I just modified it, so that there are no trades and the equity will stay at the level I enter in the Position size tab.