Priceline shares dropping Tuesday morning after the travel site said fourth quarter earnings may not come in as strongly as expected. Plus "The Oprah Effect" is paying off for Weight Watchers. The company reported subscribers rose by 18% in the latest quarter and both revenues and profit were up double digits. But the move to healthier eating is not giving a boost to shares of Red Robin Gourmet Burgers. The stock down double digits after its disappointing earnings report.