Tornier N.V. ( TRNX) is a global medical device company focused on surgeons that treat musculoskeletal injuries and disorders of the shoulder, elbow, wrist, hand, ankle and foot. This stock is trading up 5.5% at $18.43 in recent trading. Today's Volume: 225,000 Average Volume: 124,544 Volume % Change: 189% Shares of Tornier N.V. are surging higher today after the company announced preliminary fourth-quarter sales gains of 12.7% and full-year 2011 sales gains of 14.9%. From a technical standpoint, TRNX has started to challenge its 50-day moving average of $18.67 today on high volume. Market players should now watch for a sustained high-volume move and close above $18.67 and then $18.72 to trigger a breakout trade. If we get that action soon, then look for TRNX to challenge $20 to $22.32 (its 200-day) if the volume continues to track in strong on the up days.