Tech companies have unveiled a swath of new toys leading up to the holiday shopping season, and investors can learn a great deal about the expectations for these new gadgets in upcoming earnings reports—if they know what to look for. It isn’t always easy to deduce sales or expectations for specific products from corporate earnings reports. Companies like Alphabet Inc.’s Google, Microsoft Corp. MSFT, +1.16 and e-commerce giant Amazon.com Inc. AMZN, -0.38 will require reading tea leaves and tightly parsing executive commentary because the vast majority of sales come from products other than hardware. Investors will have an easier time figuring out expectations and early sales for new gadgets from smaller firms such as recently public Roku Inc. ROKU, -0.73 or fitness device maker Fitbit Inc. FIT, +0.16 That’s because their results hinge on a few products, or, in Roku’s case, device sales are split off from its fast-growing software business.via