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: GT Solar (Nasdaq: SOLR) shares jumped 12% today on news of a big order for new equipment.

So what: The acquisition of Crystal Systems in July is already starting to pay off with an $84 million order of sapphire crystallization systems for making LEDs. Jiangsu Jixing New Material Co. and Jiujiang Sapphire Tech placed the orders and bring bookings to $245 million for the quarter.

Now what: As the LED business picks up, GT Solar should see more deals like this coming through, and the order bookings have already outpaced last quarter's revenue. Fiscal 2012 looks to be a very strong year for GT Solar, and with a price-to-earnings ratio under 10, shares are priced right. I don't normally like to buy on days of strength, but I think this is just the start for shares on a climb higher.

Interested in more info on GT Solar? Add it to your watchlist.