STP is a decent one, but I really just mean to look at all solar stocks, e.g. FSLR, SOL, etc.  These guys were super hot last year and most have burned off well over 50% from their peak so far.  Alternative energy is still a sector with a bright future though, so look for these guys to jump back to the forefront when the market gets strong again.  For STP, look at how well it can hold its previous support of $30 or if it goes back down to its lower level in the low $20s.  The results of the presidential election may also influence this sector since the energy policy of the future administration could greatly hinder or aid the development of specific types of energy.