Apple (NASDAQ:AAPL) reports earnings today and investors will be watching closely to see how revenue and margins trended during the quarter. Lower-than-expected revenue could show that competitors are eating into its product growth and continued margin pressure would show that Apple can't sustain extraordinarily high profits. Erin Miller sat down with Fool contributor Travis Hoium to see what investors should look for when earnings are reported. 

Erin Miller owns shares of Apple. Fool contributor Travis Hoium owns shares of Apple. The Motley Fool recommends Apple. The Motley Fool owns shares of Apple. 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.