It's not difficult, but they [brokers] don't want to deal with retail. Replication issues, book-asymmetry, regulations; the list is long. Pinch yourself if you think UBS is offering 2-pip markets in atm straddles. I would guess that a UBS market would be inside a Saxo market by no more than 2-pips.
Your only choice is Saxo. I've never been a proponent, but their current platform is an order of mag improvement over their last, and they've fixed their BO issues.
