Luc
actually it is not even as easy as that.
yes you have lost the requirement for dealers but you still need all the rest! The only 'money' you would make would be the commission that you charge for your clients trades. You will find that the spreads offered in the 'real world' are generally no better (and often worse) than those offered by the top SB companies.
Capital Spreads average client trade size is just £5. In the FX world this type of size would cost a fortune to clear. So for every client who trades in 50 to 100 quid we have 20/30 who trade in £3 or less. You would immediately lose out on all this biz!
But the real killer is the 3% gaming duty. A client makes a £10 trade in the FTSE, you charge him perhaps £3 a side, £6 round trip, you will be charged a few quid by your clearer. Client loses £500 on trade. You owe the inland revenue £15 in gaming duty. Net loss to you ....perhaps £12
You can never recoup this gaming duty even if the client then makes money off you later on.
This is why the one company offering this type of business in the UK requires that losing clients then pay an extra percentage on their losing bets to make up for this tax (so not only have you lost but, to add insult to injury, you then have to pay more for your temerity in actually doing so).
Our unit in Gib Prospreads (
Direct Market Access Functionality Spread Betting For Professionals | ProSpreads ) offers DMA functionality but does not have the problem over the 3% gaming levy so if you are looking for this type of trading you might find that it is already out there.
Simon