WealthLab - Profit-calculation

2026-01-11T01:43:34Z - 2026-01-11T01:43:34Z ago

There is very strange bug in Wealthlab 8 build 151. I run a very simple program which buy stock at close and sell next day at close. And run the program on a watch list of 2000 stocks over 3 years, and then sort the "Profit %" tag under position. For large majority of trades, the "Profit %" is calculated correctly according the "Entry Price" and "Exit Price". However, there is always some trades that the "Profit %" is calculated as total wrong. Not sure what is problem. Look like there is some kinds of bugs if run on large dataset. See the attached image.

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Cone8

( 20.87% )

2026-01-11T09:01:44Z - 2026-01-11T09:01:44Z ago

Didn't happen for me.

Possible cause is these symbols match records in Tools > Markets & Symbols. Check for matching records, or just run the strategy with Prefs (F12) > Backtest > Other Settings > Futures Mode - not checked.

If you actually want them to be futures, then select "Raw" instead of "Margin Based" for the setting below that one: Future Percent Profit.

qunbiaoguo8

2026-01-11T17:51:41Z - 2026-01-11T17:51:41Z ago

I turn off the "Futures Mode" setting and the problem goes away. It looks like there is some problems there. I didn't see any matching symbols for those stocks that have problems before under "Markets and Symbols".

Cone8

( 20.87% )

2026-01-11T20:06:01Z - 2026-01-11T20:06:01Z ago

Which data provider?

For a test, enable Futures Mode again and then run this on one of those symbols.
Post the Debug Log -

CODE:
using System;
using WealthLab.Backtest;
using WealthLab.Core;
using WealthLab.Data;

namespace WealthScript11
{
    public class MyStrategy : UserStrategyBase
    {
        public override void Initialize(BarHistory bars)
        {
         WriteToDebugLog($"{bars.GetDataProvider()}"); 
         WriteToDebugLog($"{bars.Symbol}");
         SymbolInfo si = bars.SymbolInfo; 
         WriteToDebugLog($"{si.SecurityType}");
         WriteToDebugLog($"Point Value: {si.PointValue}");
        }

        public override void Execute(BarHistory bars, int idx)
        {  }
    }
}

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