U.S. Investors - Trading Information, page-2

One more thing:

3. Brokerage IRA (continued)
c. When a trade is made the transaction will take longer to appear because it is processed differently. Also why it must be placed over the phone, is a Federal Guideline the broker must follow to place an Brokerage IRA trade Internationally.
i. Trading U.S. domestic stock on Brokerage IRA's do not have to be placed over the phone, they can be placed by the individual.
d. Changes in Stock Price vs Changes in Account Balance
i. International Tickers Only: Changes in a Brokerage IRA's Account Balance will not update readily as a cash account because of the time delay it takes to process. The balance can lag a day or two. No worries.