Simple. First you got to have an Exchange platform where your Token is Supported. e.g IOST token is supported and can be traded to Binance.
You have to register to that exchange and get the exact address for IOST that i in the DEPOSIT section of Binance.
Once your IOST transferred to Binance there you can trade it with ETH or BTC if you want.

Words of caution.  Pls. double or triple check the address before transfering you cant withdraw IOST from MEW to ETH address in Binance. its only
IOST -IOST address.