FXOpen now offers ECN/STP accounts and they are live, not just on demo!
FXOpen's ECN bridge has taken around 2 years to develop and bring into existence and and gives you access to liquidity providers such as Dresdner, SG Paris, Standard Chartered, Barclays Capital, Bank of America, CRNX, JPMorgan, Morgan Stanley, Deutsche Bank AG, RBS, CITI, UBS, HOTSPOT INST, HOTSPOT RETAIL, GOLDMAN, LavaFX, SWFX FX, and more.
I know it's hard to prove it is a true ECN coming via MT4, that's why FXOpen also includes LVLII information so you can see your orders and the orders of others in the ECN market and can see the liquidity available to you in real time.
Anyway, you can visit
ECN Forex Trading with FXOpen broker , read more information about FXOpen's ECN/STP service and try the demo yourself if you like