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 Stocks With Big Insider Buying 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 Toxic Stocks You Should Sell With that in mind, let's take a look at several stocks rising on unusual volume recently. SurModics SurModics ( SRDX) is a provider of drug delivery and surface modification technologies to the healthcare industry. This stock closed up 6.8% at $24.19 in Wednesday's trading session. Wednesday's Volume: 263,000
Three-Month Average Volume: 71,045
Volume % Change: 287% >>5 Bargain Bin Stocks to Buy This Fall From a technical perspective, SRDX soared higher here back above its 200-day moving average of $23.59 with above-average volume. This stock has been uptrending for the last few weeks, with shares moving higher from its low of $19.73 to its intraday high of $24.95. During that move, shares of SRDX have been consistently making higher lows and higher highs, which is bullish technical price action. Traders should now look for long-biased trades in SRDX as long as it's trending above its 200-day at $23.59 or above more support at $22 and then once it sustains a move or close above Wednesday's high of $24.95 with volume that hits near or above 71,045 shares. If we get that move soon, then SRDX will set up to re-test or possibly take out its next major overhead resistance levels at $27 to its 52-week high at $27.98. New Oriental Education & Technology Group New Oriental Education & Technology Group ( EDU) is a provider of private educational services in China. This stock closed up 4.7% at $24.64 in Wednesday's trading session.