How do investors know the difference between a horrible decline and a buyable pullback?

That was the question atop “Mad Money” host Jim Camer’s mind Tuesday. Shares of athletic apparel and sporting goods maker Nike , for example, have fallen by 10 percent in the last six weeks. So is Nike worth buying now?

To get a better idea of whether Nike is a buy or a bust, Cramer went “Off the Charts.” Watch the video to see his full report.

Call Cramer: 1-800-743-CNBC

Questions for Cramer?

Questions, comments, suggestions for the Mad Money website? madcap@cnbc.com