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: Shares of Plug Power (NASDAQ:PLUG) soared 36% today after the alternative energy technologist announced that it met its projected order targets for Q4 2013.

So what: The stock has been on a roller coaster in recent months on uncertainty over demand, but today's announcement -- orders totaled approximately $32 million in Q4 -- reignites optimism over its growth going forward. In fact, Plug Power's orders include repeat business with the likes of Walmart, Kroger, Mercedes Benz, and BMW, giving investors plenty of good vibes over the diversified and recurring nature of its revenue stream.

Now what: I wouldn't expect the operating momentum to slow anytime soon. "Moving forward, as we significantly grow the business, Plug Power will increase its value-add for each customer through building our product base and establishing recurring revenue streams through hydrogen and service," said CEO Andy Marsh. "Plug Power has seen significant traction closing out 2013, and we expect the first quarter of 2014 bookings to meet or exceed the fourth quarter of 2013." When you consider Plug Power's still-significant losses and volatile stock price, however, only the most risk tolerant of Fools should even consider betting on it.