DAY MARGINS
Default margins are $55/contract for the first 50 MICRO contracts (MES, MNQ, MYM, M2K) and then 50% of the initial margin for 51 contracts and above.
Default margins are $550/contract for the first 20 eMini contracts (ES, NQ, YM, RTY) and then 50% of the initial margin for 21 contracts and above.
OVERNIGHT MARGINS
Max 25 Micro and 5 Emini at the then-stated overnight margin. Above 25 Micro or 5, Emini is 50% of the initial.