NEW YORK ( TheStreet) -- Quality Systems (Nasdaq: QSII) is trading at unusually high volume Wednesday with 1.8 million shares changing hands. It is currently at 4.1 times its average daily volume and trading up $1.10 (+3.5%) at $32.09 as of 4 p.m. ET. Quality Systems has a market cap of $2 billion and is part of the technology sector and computer software & services industry. Shares are down 16.2% year to date as of the close of trading on Tuesday. Quality Systems, Inc., together with its subsidiaries, develops and markets healthcare information systems in the United States. The company operates through four divisions: QSI Dental, NextGen, Inpatient Solutions, and Practice Solutions. The company has a P/E ratio of 25.2, equal to the average computer software & services industry P/E ratio and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Quality Systems as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures, notable return on equity, expanding profit margins and impressive record of earnings per share growth. We feel these strengths outweigh the fact that the company has had lackluster performance in the stock itself. You can view the full Quality Systems Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.