A rather urgent need

I recently had to re-format my system. I've lost ALL of my source code. But I found some not too old compiled code I can start from.

Does anyone know where I can get a good decompiler or a good one online?

Of if you've got one and can't share it, I'll post the .ex4 files and if you could grab the source code out of them that would be great!

Please don't DM. Just reply in here.

I can t recover anything because I m not a cracker only a creator... but tell me if it s possible to crack new mt4 files and how they look...
Cracked are still worthless... look trueforex.pp.ua.... many eas and indis... but cracked are complete worthless because too much information is lost..
If you are starting again...do every day a backup(or more often if you code long) from minimum indicator, include and expert folder in
(- a second disk drive on the pc)
- on a portable disk drive
- on a usb drive or similar
- on a hoster like megasync.com where there s 5 GB free
I save with date like 2021-10-21-MT4 or 2021-10-21-VPS
If you want to do automatically there is syncovery for 49$ which does the job automatically...

Thanks.

I'm not wanting to crack something that I bought somewhere. It's my own code. I'm sure if the cracked version at least came close, I'd remember the rest.

I normally do backup. Windows 11 upgrade hit me and for the first time in 20+ years, I didn't have a backup any more.

decompiling recent compiled executables isn't possible/very expensive

While not impossible, it is very difficult to do. You would need to have a program that could estimate the optimizations the compiler used as well as something that could lexically analyze and expand back into the MQL4/5 languages.
The more unfortunate part about decompilers is that comments are completely lost (in most languages, however the `input` keyword gives me hope) because the best way to make a file smaller without affecting the machine is to ditch the part that doesn't do anything.
Finding a decompiler won't be easy because it's usually an art developed and used by scammers and black-marketeers, the scallywags!

So you could look into building your own and you would learn more about MQL4/5 than just about anyone on the planet and learn a huge amount of computer science at the same time or you could hope you had notes on how to do everything...

(P.S there are youtube video series all over the place for learning to build compilers, your just compiling from a different language)