“I teach an undergrad class at the University of Virginia, and I tell my students, “I’m going to save you from going to business school.  Here, you’re getting a $100k class, and I’m going to give it to you in two thoughts, okay?  You don’t need to go to business school; you’ve only got to remember two things.  The first is, you always want to be with whatever the predominant trend is. My metric for everything I look at is the 200-day moving average of closing prices.  I’ve seen too many things go to zero, stocks and commodities.  The whole trick in investing is: “How do I keep from losing everything?”  If you use the 200-day moving average rule, then you get out.  You play defense, and you get out.” " "Paul Tudor Jones