I think I can answer a couple of the questions raised on this thread.
[B]Regarding non-U.S. brokers[/B], I would suggest you consider: FXCM Ltd (UK), Alpari (UK), and ACM (Swiss) Of those three, my preference would be FXCM, because I am already an FXCM client, and I know and trust them. Also, the Financial Services Authority in the U.K., which regulates forex brokers, offers a level of protection to retail forex customers which is not available in the U.S.
[B]
Regarding liquidity providers (banks), trading platforms and data feeds[/B]: in the case of FXCM, all of these are the same for FXCM LLC (US) accounts and for FXCM Ltd (UK) accounts.
[B]Regarding taxes[/B]: the U.S. imposes a tax claim on the worldwide income (including forex trading profits) of U.S. citizens, regardless of where they reside. You can live and work in the U.K., for example, and even hold dual US/UK citizenship, and the U.S. IRS will still claim that you owe U.S. income tax on all of your income, no matter where it is earned.
The only way to get the IRS completely off your back is to RENOUNCE your U.S. citizenship.
Many people, hearing all this for the first time, do not believe it. So, I will furnish three links to the website of a tax attorney who specializes in taxes for expatriate Americans:
*US Expatriate Tax Return Information and Preparation by Attorney &CPA with 27 years experience Don Nelson’s home page.
US Citizens Living Abroad, Expatriates, IRS Income Tax Explained Tax highlights for U.S. citizens living abroad.
Foreign Bank and Financial Account IRS Reporting for U.S. Expatriates Foreign bank account reporting (FBAR) Form TDF 90-22.1, required by IRS, for U.S. persons living abroad.
As they say in poker, [B]Read 'em and weep[/B].
Clint