Quote from Emini Maestro:
As an index futures trader, I am tempted by Forex, but the daunting task before me is learning its patterns, behavior, responses and periods of biggest volume. I'm just not sure I want to go back to school and learn a new instrument, but as I watch domestic emini volume decrease, I may have to.
It's pretty easy to find out the high volume hours. Check out:
http://ezinearticles.com/?The-Best-Time-To-Trade-The-Forex-Market&id=403035