Please follow the steps in the quick start guide - Adding a Broker to your Account to verify your live trading connection.
Please ensure that you have upgraded to pro plan. You can upgrade your plan from your profile.
For a list of brokers and instructions on how to activate one please visit the brokers page. You can always start from a paper trading account and move to a live account once you are confident.
The live trading module can be accessed by navigating to “Live” from the toolbar on the left.