I will open accounts on some exchanges soon. I would like to prioritize one where I will be able to practice for free. From what I have read and seen so far, Binance seems to be considered the best exchange overall. However, I didn't see any mention of being able to practice for free on Binance website. So which exchanges would be best for that?
I still don't know what kind of deal you're talking about. But for normal trading, exchange doesn't seem to support it. because it is one of those transactions that is easy to understand. As for margin trading, there seems to be a lot of support exchanges. You can access and try demo accounts at Bitmex, Snapex, Bingbon. There you can freely demo transactions with huge accounts.