The MCcoin available balance of an account at can be sent to the MCExchange, by accessing the MCExchange from the account at through the main menu.

You have to press the MCExchange option and a new tab will open in the browser for access to MCExchange.

At the bottom there is the space where to indicate the amount of MCcoin that you want to transfer from your account at to the MCExchange.

Here is a video tutorial where to see you can see how to send your available MCcoin balance in to MCExchange.