An exchange cant revert hours of trades back just because one account got hacked.
Why do you speak lies? Ever heard of the flash crash? Trades are backed out all the time on global exchanges. You are ignorant and uneducated.
I was referring in terms of Bitcoin exchange, my bad for not making that clear. If we were to follow the Bitcoin philosophy than reverting hours of trading would go against that philosophy and that's why so many people are against the idea of changing the trades back.