...
If your brokerage offers online bill payment, and you want to create a reminder or a repeating online payment for any of your regular cash transactions, you must add a linked checking account to your brokerage account.
...
If you set up your investment account for transaction download, Quicken may be able to identify your money market fund and track its performance for you. If you haven't set up your account for transaction download, you can track the performance of your cash manually.