DELAFIELD, 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.>>5 Hated Earnings Stocks You Should Love Major moves in volume can signal unusual activity, such as insider buying or selling -- or buying or selling by "superinvestors." 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. >>5 Stocks Poised to Break Out With that in mind, let's take a look at several stocks rising on unusual volume today. StealthGas StealthGas ( GASS) owns a fleet of LPG carriers providing international seaborne transportation services to LPG producers and users, as well as crude oil and product carriers chartered to oil producers, refiners and commodities traders. This stock closed up 6.4% at $12.30 in Monday's trading session. Monday's Volume: 712,000
Three-Month Average Volume: 219,097
Volume % Change: 255% >>5 Rocket Stocks to Buy in November From a technical perspective, GASS ripped sharply higher here right off some near-term support at $11.45 with strong upside volume. This move is quickly pushing shares of GASS within range of triggering a big breakout trade. That trade will hit if GASS manages to take out Monday's high of $12.35 to its 52-week high at $12.86 with high volume Traders should now look for long-biased trades in GASS as long as it's trending above some key near-term support at $11.45 and then once it sustains a move or close above those breakout levels with volume that hits near or above 219,097 shares. If that breakout hits soon, then GASS will set up to enter new 52-week-high territory, which is bullish technical price action. Some possible upside targets off that breakout are its next major overhead resistance levels at $17 to $20.