Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: After a fine earnings report, shares of mobile data service expert Motricity (Nasdaq: MOTR) gained 16.4% today in more of a slow boil than a pop.

So what: Third-quarter sales surged 35% year over year to $38 million while earnings tripled. Yet investors needed to think about the results for a while before boosting the stock much, helped along the way by positive analyst notes.

Now what: Motricity's mobile data platform is an integral part of data-chugging phones on every major American network, including AT&T (NYSE: T), Sprint Nextel (NYSE: S), and Verizon (NYSE: VZ). The company is also moving into customized smartphone applications and services for their carrier partners, and the business model is paying off in spades because Motricity doesn't have a whole lot of direct rivals. The company went public in June (though the operating history stretches back to 2001) and the stock has gained 160% since then.

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