Forex is supposed to be the most liquid market that really moves. But, i'm looking at the intraday volume, and it's not very high. I was under the impression that if i want to day trade a $20 mil account, i could do it with Forex. But that doesn't seem to be so. What market could i use to trade an account that large or lets say even a $200 mill account (hey this is just a hypothetical question), and enter the position all at once? What's really the most liquid out there?