I logged into the game and all my characters were converted to the trade league

I logged into the game and all my characters were converted to the trade league
I definitely didn't press anything, yesterday I just exited the game, today I logged in and saw that all my characters are in the trade league

From which league? SSF Mirage?

How about everything else, is the currency still in the stash in the old league?

Does anyone else have access to your account?

(I looked up your elementalist on POE ninja, and can see what you mean. Latest snapshot is showing it still in SSF, while your account is showing trade. Unsure how long that takes to update, but must of happened relatively recently. When was the last you played?

Might be worth contacting support if you don't know what happened. Most likely they won't be able to help, but maybe you can find out what happened, if your account has been hacked. It's not really possible to do by accident. You have to push multiple buttons, with a warning. Might be an idea not to play further unlit you understand what happened, though I doubt it can be reversed.)

yes mirage legue,No one has access to my account. Is it possible to return the characters and chest back to the SSF mirage League?

Very much doubt it. The migration only goes in one direct. You should probably try to talk to support, because it doesn't seem there is any explanation of how this happened. I don't know what they will say, maybe nothing, but maybe they know the time that it happened.