correlation [ (skull size / total mass ratio), trading performance alpha ] > 0 ? I'd venture a guess that it's a least a factor with this guy. Check out the melon. http://www.futuresmag.com/Issues/2011/March-2011/Pages/William-Eckhardt-.aspx "Eckhardt launched his own commodity trading advisor (CTA) in 1991, which has produced a compound annual return of 17.35% over 20 years and earned 21.09% in 2010."