NEW YORK ( TheStreet) -- Weight Watchers International (NYSE: WTW) is trading at unusually high volume Friday with 1.3 million shares changing hands. It is currently at 4.3 times its average daily volume and trading down $2.25 (-3.4%) at $63.14 as of 10:27 a.m. ET. Weight Watchers International has a market cap of $3.3 billion and is part of the services sector and diversified services industry. Shares are up 19.8% year to date as of the close of trading on Thursday. Weight Watchers International, Inc. provides weight management services worldwide. It offers various services and products that are built upon weight management plans comprising nutritional, exercise, and behavioral tools and approaches. The company has a P/E ratio of 20.7, below the average diversified services industry P/E ratio of 21 and below the S&P 500 P/E ratio of 23.4. TheStreet Ratings rates Weight Watchers International as hold. The company's strengths can be seen in multiple areas, such as its revenue growth, solid stock price performance and good cash flow from operations. However, as a counter to these strengths, we also find weaknesses including deteriorating net income and feeble growth in the company's earnings per share. You can view the full Weight Watchers International Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.