NFA insituted a regulation that caps forex margin at 100-1 for majors and 25-1 for exotics that starts in nov 30th. Some brokers are implementing it early
You can still go overseas if you need this kind of leverage. The new NFA margin regs should not affect non-NFA brokers. I am sure you can still find a few 400:1 Cyprus if you still needed that leverage and from what I understand, a lot of EA systems rely on that excess leverage for their systems.