People differ on the method by which stock should be valued. Some people are chartists, others behavioralists. The basic difference between these groups is: chartists rely on astrological charts to predict stock values, behavioralists rely on psychology. behavioralists are finance based, chartists study charts of investor psychology. chartists study charts of stock prices; behavioralists focus on investor psychology and behavior. chartists and behavioralists are the same in their approach; essentially there aren't any differences