Just looking at some daily charts, and thinking about exits for this system. It may be as easy setting a profit target of say 30 points. When your profit target is reached you simply make the price 5 points under the current price your line in the sand.
This allows you to continually profit from volatility, without giving back too much paper profit. Having extremely low commission rates will help make this system work. Slippage would be less on the ES than the NQ.
Runningbear