Quote from Magna:
Not at IB you couldn't. Besides their minimum account requirement of $2,000 you would also bump into their intraday initial margin requirement to open 1 ES contract which currently stands at $1,781. And, perchance, if you wanted to hold that 1 contract overnight the initial requirement is $3,563. So I'm not sure how you could "start daytrading 1 ES with $1,500" when you'd be hard-pressed to find a brokerage that would allow you to open an account with that little, or meet the minimum margin requirement. And even if you could, I suppose you're assuming you won't have any losing trades in the beginning....
Let's get realistic here folks, or we're gonna have another one of those Turn $5,000 into $1million threads.