Vivus ( VVUS) is engaged in development and commercialization of therapeutic drugs for large underserved markets, including obesity and related morbidities, such as sleep apnea and diabetes and men's sexual health. This stock is trading up 11.8% at $11.36 in recent trading. Today's Volume: 2.9 million Average Volume: 1.5 million Volume % Change: 173% From a technical standpoint, VVUS is gapping up huge today with volume above some near-term overhead resistance at $10.79. Traders should now watch for a sustained high-volume move and close above its next significant overhead resistance at $11.48. If we get that action soon, then look for VVUS to challenge $12.98 to $13.68 in the coming days of weeks. Keep in mind that it will be important for VVUS to stay above $11.48 if there's any chance of a re-test of $12.98 to $13.68. To see more stocks rising on unusual volume, including Acorda Therapeutics ( ACOR), Brightpoint ( CELL) and Spreadtrum Communications ( SPRD), check out the Stocks Rising On Unusual Volume portfolio on Stockpickr. -- Written by Roberto Pedone in Winderemere, Fla.