Currenex is just the technology (platform) provider. You need to go to a Currenex broker to open an account. They are listed on the Currenex website. Some brokers accept retail accounts, but the lowest account minimum requirement that I'm aware of is $25,000. If you plan on news trading, get ready to get banned though.
I am trading with Dukascopy and such situation is very often . And if you put your own bid or offer then you can win the spread.
I don't trade news, but just curious, why would they ban a news trader if they're a real ECN and not a bucket shop?
They are not a true ECN. I'm not sure that such a thing exists despite various claims. If a true ECN environment would exist at this time, banks wouldn't be posting the same liquidity they do now on "almost-ECN" systems. Unfortunately, banks still call the shots and they're a bunch of money-hungry, wining sissies. As the market becomes more centralized and ECN-like, the unfair (and illegal) advantages banks now enjoy now should begin to disappear.
I am with Duka for almost 3 years and haven't seen spread lower than 0.5 and that's for EURUSD only. On what pairs and what time you've seen zero spread on Duka?