that allows its customers to buy new stock against a sale of other stock before the sale has cleared. Yes you can do that at Fidelity but you still have to hold the newly aquired stock for 3 days.
TDA gives me that courtesy[buying new stock against a sale of other stock]. But a trade did have to clear in a SEP-IRA before a cash Minimum Distribution transfer to another TDA account could be closed in 2014.