800 5th Avenue
The Bittrex exchange is easy to use with its simple graphical user interface, ION is paired there with BTC.
The Escodex exchange is easy to use with its simple graphical user interface, the interface is actually a web browser wallet and stored locally so you must be sure to back up the wallet seeds, if you do not have these and the wallet fails, you will not be able to gain access to your account and holdings again. $ION is paired there with BTC.
Seoul, Gangnam-gu, Teheranro 4-gil 14, 5th floor
Upbit is an exchange based of Korea, the trading view is simple yet effective. ION is traded with BTC there.