What's the Best Reverse Indicator for the Stock Market?

Facebook has lost about 75% of its value, which is unbelievable. If you would have listened to Jim Kramer and bought on that day, you'd be down 28%. For the first time ever, I saw Jim Kramer actually come out and make a formal apology. What he should do is he should stop telling people to buy and sell. He should probably just hang up his hat and realize he's the absolute worst.