MADISON, Wis. ( Stockpickr) -- Professional traders running mutual funds and hedge funds don't just look at a stock's price moves; they also track big changes in volume activity. Often when above-average volume moves into an equity, it precedes a large spike in volatility.Major moves in volume can signal unusual activity, such as insider buying or selling -- or buying or selling by "superinvestors." >>5 Stocks Ready to Soar on Bullish Earnings Unusual volume can also be a major signal that hedge funds and momentum traders are piling into a stock ahead of a catalyst. These types of traders like to get in well before a large spike, so it's always a smart move to monitor unusual volume. That said, remember to combine trend and price action with unusual volume. Put them all together to help you decipher the next big trend for any stock. With that in mind, let's take a look at several stocks rising on unusual volume today. >>5 Rocket Stocks to Buy for Dow 15,000 Westlake Chemical Westlake Chemical ( WLK) is a manufacturer and marketer of basic chemicals, vinyls, polymers and fabricated products. This stock is trading up 4.6% at $86.31 in recent trading. Today's Volume: 717,000
Average Volume: 553,889
Volume % Change: 142% Shares of WLK are trending higher here after the company delivered a profit that beat Wall Street's expectations but missed on beating revenue expectations. Adjusted earnings per share rose 40.46% to $1.84 vs. EPS of $1.31 in the year-earlier quarter. Revenue decreased 16.45% to $864.6 million from the year-earlier quarter. >>5 Stocks Poised for Breakouts From a technical perspective, WLK is gapping higher here and quickly approaching its 50-day moving average at $88.05 with above-average volume. This move is starting to push shares of WLK within range of triggering a major breakout trade. That trade will hit if WLK manages to take out its 50-day at $88.05 and then once it clears more resistance at $88.98 with high volume. Traders should now look for long-biased trades in WLK as long as it's trending above today's low of $84.65 and then once it sustains a move or close above those breakout levels with volume that hits near or above 553,889 shares. If that breakout triggers soon, then WLK will set up to re-test or possibly take out its next major overhead resistance levels at $92.50 to $95.