ok this one I actually thought about for a long time before I decided to post but heres the problem

every time I follow the missile trail tutorial from highend3d I get the last couple particles to glow for no reason. no where on my rgb ramp does it go bright on its end and the opacity ramp is completely dark in its end. I think this would apply mostly to the ones who've encountered the same problem in the past. any ideas what I'm doing wrong and how you fixed it? i've been trying to figure this out for the past couple weeks.