Just a mention. LMAX (London Multi-asset Exchange). A very interesting concept. JPM and GS are liquidity providers. Thompson Reuters. data. DMA model, no MM. Reasonable commissions (same as IB). I've just opened an account and am receiving 200:1 margin; great. I don't have to stick 10,000 + into some outfit's coffers at my interest loss. The spreads are truly great: <0.5 for eur/jpy/gbp/usd most of liquid hours. They have several api solutions which are FREE. They have just hooked up with Multicharts and offer platform free if 2.5 mil traded each month. The min lot size is a single mini lot (10,000). They are very fast and you get the price quoted. It's early days for me but I cannot see any drawbacks at the moment. The charts are okay if your doing minute based analysis. Only thing: not available to our freinds in the USA yet. But eurozone, fine.