I think you dont know what you speaking about... FESX is a future, and there is only one price, the price on the exchange. Its a regulated instrument, NOT like FOREX. So there are no buketshops on futures.... GO STUDY
LOL! on exchanges are 2 prices (bid and ask)!!! I have compared cost of trading on regulated market (eurex ~1,5 of point including commissions) to bucket shops like gft, igindex..and else
with someone like IB that will be more like 1.26 in total for a roundtrip, so a CFD is like over 50% more expensive and that is if you don't sit on the bid and ask then you pay no spread at all, just 0.26 for costs. Like I said you really need to wake up !