Quote from Aok:
3.90 rt
You'll need to do 2-10x your monthly figures to go lower.
In the meantime...
http://www.interactivebrokers.com/en/p.php?f=futuresComparison&ib_entity=llc
Quote from osorico:
Agree. Sub $4.00 RT all-in is a fair rate and is available at many brokerages who negotiate.
But why would you recommend IB with a 10K opening requirement and $4.80 RT all-in for ES and ER, which is what the OP is interested in. Based on the OPs interest, from a pure commision standpoint MBTrading with a published 2.25, $4.50 RT all-in rate, no volume quota, 2K opening requirement beats IB handily.
Osorico