You will need to manually create a Trading Account under your “My Accounts” tab to receive your MetaTrader login details via email (See below to create a MetaTrader account).
Instructions for doing that are provided when you create an account. The email will contain your details.
To create a Trading Account, follow these steps:
Click “My Accounts” and then click “Create Account"
You will be brought to the next screen to choose “Account Type and “Leverage”
Now click “My Accounts” and your new account is there.