You can find your maximum credit limit by selecting Account → Credit Account from your account's sidebar.

Please note that this is the overall maximum limit you can spend per day, regardless of your total Cash Account balance.

For example, if you have a maximum credit limit of $100,000, with an account balance of $150,000, you would still only be able to spend $100,000 per day.

Your Credit limit, that is the amount of money you can spend in a given day, can be found on the Credit Account page accessible through your dashboard.