Actually my partner Dion is from the US and I am German; to disappoint you even further I have to admit that the brain is sitting in the US and the marketing/sales side was more or less German; so you are only half right.
BTW, now it is all US since Fidelity bought Wealth-Lab but you can still test european market if you buy WL-Developer.
I have an evaluation copy of an excellent charting/trading package that is developed in Germany.
It is targetted at institutional and high-end traders ($$$) but it is first class. Far superior to TradeStation in many respects. And it's all .Net architecture - bonus!!
FWIW - they have an affiliation with Reuters I believe.
I have no association with guys other than being a prospective customer.