If your Bronze, All you can do it place manual trades, no automatic trading. Just manual trades on the exchanges
If your Silver, You can pick one exchange and auto trade the coin of your picking on the one exchanges.
If your Gold you will have access to all the features, You will be able to auto trade one coin on multiple exchanges.
I have been bugged about making the app trade multiple coins, and I like this idea. But right now it will only be one coin. In the future it will probably change.