Yes, I see the same. My orders are placed via a script as well, and I don't click the update button and the trail order has worked fine on its own. The one thing I haven't been able to figure out is how to know what is the current value of the fix pegged order once it's triggered....maybe if I get the order via API and examine it, maybe there is a field that has the value, but I cant see any such thing in TWS. Let us know if anyone knows how to do that.