sorry for the long time of no response, I check into FSB at least once a year and just did it again (I am a StrategyQuant user actually). I have tried FSB Pro 3.5 right now and see that the custom acceptance criteria has not been done yet within the software but would still be needed to be "hacked", is this correct?

I really had the hope it would have been added meanwhile as this is something crucial in my opinion for generation good strategies, at least that´s my finding from the last 8 years in developing trading systems. I much like the system that SQ offers in that relation, in being able to "weight" several acceptance criteria values as the main accept criteria (e.g. net profit, return / dd ratio, equity curve stability) against each other, e.g.: put 70% weight on net profit, 20% weight on return/dd ratio and 10% weight on equity curve stability (R^2) as the final custom weighted acceptance criteria.

Right now I see now way to do that and especially the equity curve stability is a completely missing acceptance criteria (as I would prefer to trade a strategy with 100000 net profit and a R^2 of 0.98 over a strategy with 400000 net profit but a R^2 of just 0.7 - a unstable equity curve), or did I not look hard enough? It would also be great if we would be able to sort the systems by that custom criteria in the repository, but I guess that would automatically happen anyway if that the custom criteria was used as a acceptance criteria?

I am a new buyer for sure as soon as I would be able to work so flexible with the acceptance criterias like I can in SQ, it´s really a "must have" for me.

Thanks a lot for your dedication and great work, so much appreciated.

1. Declare a global variable:

        private double myParameter;

2. Add method for calculating the parameter:

private void CalculateMyParameter(IBacktester backtester)
{
    int firstBar = backtester.Strategy.FirstBar;
    int bars     = backtester.DataSet.Bars;

    double[] equityLine = new double[bars-firstBar];
    for (int bar = firstBar; bar < bars; bar++)
        equityLine[bar-firstBar] = backtester.MoneyEquity(bar);

    double equityStdDev = StdDev(equityLine);
    double netBalance = backtester.NetBalance;

    myParameter = netBalance / equityStdDev;
}

3. Call that method from "CalculateAccountStats(IBacktester backtester)"

            CalculateMyParameter(backtester);

4. Set the parameter in  "GetInfoRecords()"

 
            records.Add(new InfoRecord
            {
                Name  = "My Parameter",
                Value = myParameter.ToString("F2"),
                Flag  = myParameter < 1
                    ? InfoRecordFlag.Bad
                    : myParameter < 4
                        ? InfoRecordFlag.Normal
                        : InfoRecordFlag.Good
            });

The custom Account Statistics file is attached below.

Currently you can add a new parameter to the custom Acceptance Criteria, but it will not be used as an acceptance criterion. What you can do is to "hack" some of the other params.
If ore users are interested in adding custom criteria, I'll add such feature.

would it be possible to be able to use a custom fitness function as the generating / optimizing goal? I would like to use something along the lines NetProfit / EquityCurveStdDev. I am already doing this in MT4 in my own EA´s and this custom fitness produces very good results, but there seems to be no way to do that in FSB Pro.

Thanks.