Most credit cards don't allow ACH payment from Savings account, but it still works by entering saving's Routing and Acct#. I wonder if broker's checking account has this loophole as well. If I entered the rounting and account from the checks I got from my broker, can I use it for ACH? So I can add checking# from BrokerA in BrokerB's ACH setup. That means I can ACH between two brokers now.