When you create a Live Account with BTC currency, your balance in your Live Account will be shown in BITS. If you compare it to a USD account, for instance, 1BIT has an estimated value of 1Cent of 1USD.

To create a BTC Live Account, you will have to select the BTC currency option from the drop-down menu provided when creating the account. 

Upon logging in to your account, your balance in your MT4 will be in BITS.