Hi milkeyk,
Thank you for your help.
I think ISX FX have just started, they guarantee to beat any other rate offered. I was quoted 0.5% away from the interbank bid by HIFX, but ISXFX quoted me 0.25% away, thats a 25pip saving. I asked how they can offer such a service as I myself have worked for deutsche & cmc, but they did not say.
My trade was for £100,000 into USD, thats $250 for ISXfx (i don't know how they make money).
They also quoted me a 2 - 5% margin on forwards of any size.
I have traded CFDs whilst I was at CMC and I don't trust any RFQ systems (too much manipulating).
I agree about trying to rip you off. When I first called HIFX, they quoted me 1.5% out on a £50,000 trade. I told them that I traded Futures from the states and needed to hedge my account. After this (I guess because they now that I have a good understanding of the market) they were willing to go down to 0.5%. Funny that!