I am using specially prepared expert to trade martingale as it did not work.
FST and FSB Pro are using the same Expert and Library.
Both products works in the exactly same way.
If you made modifications of your expert, they should work in the same way in FSB Pro.
Unfortunately MetaQuotes made changes in MT4 and many old experts stopped working.
I and Serfel updated the expert for FST and FSB Pro FOR FREE.
You don't have to buy anything you don't want. An you don't have to be angry for something that is not under our control.
Be sure we are working on 100% to fix all issues and to provide better user experience.
By saying we, I mean me and some other collaborators.
With selling FSB Pro, I hope I can hire developers to bring the project on another level.
I suggest you to calm down and to rest for several days. In that time you can try using some other tools for developing and testing strategies - for example MetaTrader. If you fill much better coding in MQL, greet. You don't need FSB.
If you are still our user - it's even greater.
We'll try to make your forex journey better and smoother. (in our free time of coerce. Because our main efforts are towards making FSB Pro even better)