If you are sweating bullets over this type of scenario, trade options instead...Granted, there are "complications" such as buying calls and puts when the IV's are imploding, but on balance in a relatively stable volatility environment, you can fill on the ES futures options reasonably well...It won't work for scalping, but if you are holding for a bit of time and playing 5-10-20 pt moves, then this might work for you...There are alot of people who would rather just have their worst case scenario be the premium paid for the options.