You may think how would you check your actives to make sure if someone accessed your account. First of all, you may check your post history and incoming + outgoing PMs. Hacker would delete PMs, so there would be some difficultly. In that case, your IP log would help if you aren't using the Tor browser. Here is the link:
https://bitcointalk.org/myips.php, here you may see past one month IP logs. Again, it won't work if you are using Tor due to a random IP address. But at least you may notice the time when you access your account.
You could always just try connecting via tor through the same country or region (not the same as yours though)... Then when you check your ip logs, it'll look weird if it's from anywhere else.
I went through my ip log for the last month and there's only the two parts of the world I set my vpn to listed there.