Is it safe to import MEW account with Forkdelta and trade?

i am new to forkdelta need help and suggestion?? thank you in advance.
if me it is better to make new wallet first, like was everyone told to me. make new wallet and then send your token that you want to sell and ETH for gas, and then you will free safely to import private key from that new wallet and it will not disturb your other coins in your old wallet