Trying to time the market is not a good idea. That's doubly true when you know volatility is right around the corner. 

That's an important disclaimer for this article, because I'll be introducing three stocks that have a very high probability of making huge moves in the week ahead. That's because all three are reporting quarterly earnings, and all three are heavily shorted -- or have lots of investors betting against them. If you don't believe me, just look at the three stocks I singled out last week, which moved an average of 7% after reporting earnings.

Using this information to try and make a quick profit, however, is dangerous. While I know there's a high likelihood of outsized moves in store, there's no way to tell you if those moves will be up or down.

Instead, I think it's vital that long-term shareholders of Stratasys (NASDAQ:SSYS), Abercrombie & Fitch (NYSE:ANF), and Amabrella (NASDAQ:AMBA) -- the three stocks for this week -- ignore the noise and focus on what really matters when these companies report. To find out what those important metrics are, check out the slideshow below.

Sources: Stratasys, GoPro, Abercrombie & Fitch.

Brian Stoffel owns shares of Apple and Stratasys. The Motley Fool recommends Ambarella, Apple, GoPro, and Stratasys. The Motley Fool owns shares of Ambarella, Apple, and Stratasys. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.