NEW YORK ( TheStreet) -- Royale Energy (Nasdaq: ROYL) is trading at unusually high volume Monday with 2.5 million shares changing hands. It is currently at 4.1 times its average daily volume and trading up 82 cents (+18.1%) at $5.36 as of 4 p.m. ET. Royale Energy has a market cap of $47.1 million and is part of the basic materials sector and energy industry. Shares are down 0.9% year to date as of the close of trading on Friday. Royale Energy, Inc. operates as an independent oil and natural gas producer in the United States. The company has a P/E ratio of 225.5, above the average energy industry P/E ratio of 219 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Royale Energy as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, good cash flow from operations and expanding profit margins. However, as a counter to these strengths, we also find weaknesses including deteriorating net income and disappointing return on equity. You can view the full Royale Energy Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are rising on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVUP to 95370 or select from multiple alert options.