Buckle up, Fools! If you own shares of the three companies I'm talking about this week, prepare yourself for extreme volatility.

That's because all three stocks are reporting earnings this week, and all three are heavily shorted -- meaning they have lots of investors betting against their short-term success. When these two variables combine, volatility is almost always the result. 

But I don't think you should use the information I'm about to give you to try to turn a quick profit. Instead, if you already own shares of Outerwall (OUTR)Herbalife (HLF 2.91%), or SolarCity (SCTY.DL)-- the three stocks for this week -- the slideshow below will tell you what's worth paying attention to and what's just noise.

Photos: Herbalife, SolarCity, Outerwall.