I've been sim trading using Ninja Trader with Mirus ZenFire for 8 days using Boomerang, Trade Bias, ForceIndex, Risk Manager and Ultimate Trailing Stop indicators. Still adjusting but the Ultimate Trailing Stop which can use a variety of indicators, i.e. Bollinger, ATR is default set to 3 ATR. That's what I've been using but noticing, as you have that this might not be a wide enough stop. I'm new to futures (10 days) and still feeling my way around. I trade the following markets: 6E, CL, CG, NQ, TF. I use the trailing stop to follow the up trend when I'm in the trade. I found keeping my sell limit stop one trailing stop back from the recommended trailing stop when the instrument is running is a good idea. Of course you have to watch it as it's moving.

I'm still fighting getting up at 2:45AM US EST to trade the London Opening. If you're using NT, I'd suggest you do the Market Replay after hours to practice and refine your boomerang trading skills. I've also looked at the Emini Watch indicator videos but for now I'm going to "dance with the girl I brung to the dance" and concentrate on Boomerang. One variant that Matt Bowen uses (he developed the risk manager and works for Indicator Warehouse) is using the GMMA in lieu of the trade bias lines in the boomerang. He doesn't scalp as close as Mohan (the developer) does apparently. For what it's worth.

Be interested in hearing how you're going.