Quote from torero:
Is not possibel with IB to trade the mini futurs with 3000$ ?
Yes, you can. The intra-day initial margin for the ES is $2K.
It goes up to $4K at 15:45 ET. That means you need to be flat (i.e. have no position) by that time, or have more than $4K (per contract), or your position will get liquidated automatically between 15:45 and 16:15 ET.
Also, you cannot open a new position if your account falls below $2K.
I think equity is the lesser of your previous day's equity or your current equity (it's this way for stocks - not sure about futures).
Can someone comment on when the requirement goes back down to $2K again? It doesn't mention this on the relevant page.