Rackspace Hosting (RAX) has recently broken out above some previous resistance at $12.50 a share on some very heavy volume. The stock is now trading at all-time highs and is firmly in the hands of the bulls.

Shares of Travelzoo (TZOO) have recently hit a new 52-week high. The stock has some previous resistance at around $12-to-$13 a share. If shares can get above that level it could make a run at $17.

STEC (STEC) is trading at all-time highs and the stock is showing no signs of weakness. It's overextended at current prices, but on a pullback it could be a good buy candidate.

Spectrum Pharma was just added to the Russell 3000 and 2000 indexes. Watch for a breakout at around $8 a share on SPPI. If the stock can crack through that level it could head much higher.

Shares of Deltathree (DDDC) are making new 52-week highs. The stock has also cleared some previous resistance at around 22 cents a share and traded up to 24 cents, before pulling back to 22 cents. This stock could now be setting up to make a run at 53 cents or possibly even higher.

Shares of Rockwell Medical Technologies (RMTI) have recently hit a new 52-week high and a new all-time after the stock traded through $8 a share. The stock is getting hit hard today, down 16%, but keep an eye on this name.

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