Quote from Kedwards:
ES has lots of scale and $500 margins, so as long as psychology isn't the issue, sizing up is the only thing limiting $15,000 from $150,000.
Scaleability is obviously an advantage with the ES and you can compound your profits and add contracts. However, trading 10 contracts on a $5K account is a losing approach, unless you`re God
And if you were, I guess you would not need to trade