Mr. Question wrote:

And here is another weird thing: I sent my source code to a professional mql5 programmer on Fiverr and he said that he ran the EA on a hedging account without errors.

Same broker or not?

No different broker.

And here is another weird thing: I sent my source code to a professional mql5 programmer on Fiverr and he said that he ran the EA on a hedging account without errors.

Same broker or not?

It seems you were right after all. When I removed SL and TP the error didn't pop up again. However, now the problem is that the backtester doesn't trigger any orders. The graph remains linear throughout the entire testing period.

Mr. Question wrote:

Are you saying I should create the EA without SL and TP? I can't do that as SL and TP is part of the strategy's profitability. I already tried out all TFs and they all give the same error.

No, removing SL and TP is for backtest only

Ok I'll try it out later when I'm back home.

Are you saying I should create the EA without SL and TP? I can't do that as SL and TP is part of the strategy's profitability. I already tried out all TFs and they all give the same error.

No, removing SL and TP is for backtest only

Why not try using MT4?

Because my client base increasingly uses MT5 and wants custom tailored EAs for the MT5 platform. The turnover for MT4 products is rapidly deteriorating since 2019 and is commercially not viable anymore from a Benefit-Cost-Ratio perspective.

And no the strategy was not uploaded, you need to select the file then click "ADD FILE" to the right.

Problems usually came from mt5, please test it with lower TF such as M1 or M5, also you can try to remove SL and TP from forexsb and then export and test the EA again

Are you saying I should create the EA without SL and TP? I can't do that as SL and TP is part of the strategy's profitability. I already tried out all TFs and they all give the same error.

It would have been nice if the product description mentioned this little but important detail. Is there a way to code the support of hedging accounts into the mq5 source code? If not then I have to go the tedious route and ask each one of the major FX brokers whether they even offer netting accounts. In case most of them don't, I'll have no option but to contact my cc provider and revert the payment I made. It would be a real shame because FSB Pro is an otherwise awesome software with lots of potential that unfortunately is left unused.

Addendum: was my mq5 file uploaded correctly? I can't see the file being attached in my original post.

Addendum #2: the EA hasn't performed live yet, as it is based on the daily TF and trades maybe twice a month.

Common problem with MT5 hedging accounts, especially demo accounts, hedging accounts are not supported by Pro experts, you have to use netting account.

How does it perform live?

https://www.mql5.com/en/forum/259922

To give some more info: i have tried testing it on an ICMarkets Demo account which is a 5 decimal broker. Would be nice if the devs could help me out with this...

Also could be an issue with the SL/TP, some brokers only allow you to set this after the trade has executed. I'm not sure how FSB handles opening positions in this manner but I remember glancing over the code and seeing a footnote beside where you can switch this