When you tried cancelling transaction, did you put nonce of your previous stuck transaction?
Edit: nvm, it's success now
~
I haven't used the Forkdelta exchange in almost 2 years because I know their trend is up, but is there someone who still uses it? is this dex still safe?
I don't see any need of it after uniswap (and such dexes), only time it may be useful is when there is arb opportunity. Regarding safeness, always use dummy address, I was phished once in 2017 (I think it was etherdelta then).