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 electronic control device (ECD) manufacturer TASER International (Nasdaq: TASR) zapped up more than 20% in intraday trading, on the news that the company had received several large orders.

So what: Today, TASER announced five new orders for its gear. The first came from a U.S. federal agency, for 692 of the company's X26 ECDs and 1,384 cartridges. The other orders were from four international customers, totaling 3,110 M26 ECDs, 712 X26s, 712 Taser CAM units, and 65,000 cartridges.

Now what: The news was apparently a very welcome relief for TASER investors after a somewhat disappointing third-quarter showing. But is this a surefire green light for the stock? I've always liked the idea of TASER and its business, and I've actually given the stock a thumbs-up in my CAPS portfolio. But I'd like to see the stock get a good deal cheaper before I take a real-money stand on it. Sure, the orders are a very good thing for the company, but TASER just seems always on the verge of something, rather than actually getting there.

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Fool contributor Matt Koppenheffer does not own shares of any of the companies mentioned. You can check out what Matt is keeping an eye on by visiting his CAPS portfolio, or you can follow Matt on Twitter @KoppTheFool or on his RSS feed. The Fool’s disclosure policy assures you no Wookiees were harmed in the making of this article.