WINDERMERE, Fla. ( 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. >>Trade 5 Hated Names to Beat the Market Major moves in volume can signal unusual activity, such as insider buying or selling -- or buying or selling by â¿¿superinvestors.â¿ 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.RexnordRexnord ( RXN) is a worldwide industrial company comprised of two strategic platforms: Process & Motion Control and Water Management. This stock is trading up 1.8% at $18.25 in recent trading. Today's Volume: 421,000 Average Volume: 217,160 Volume % Change: 193% From a technical perspective, RXN is bouncing modestly higher here right near its 50-day moving average of $17.31 with above-average volume. This move is quickly pushing RXN within range of triggering a near-term breakout trade. That trade will hit once RXN manages to take out some near-term overhead resistance levels at $18.90 to $19.00 with high volume. Traders should now look for long-biased trades in RXN as long as it's trending above its 50-day at $17.31, and then once it sustains a move or close above those breakout levels with volume that hits near or above 217,160 shares. If that breakout triggers soon, then RXN will set up to re-test or possibly take out its next major overhead resistance levels at $19.76 to $20.50. Any high-volume move above those levels will then put $21.58 to $22 into focus for RXN. CienaCiena ( CIEN) is a provider of equipment, software and service solutions that support the transport, switching, aggregation and management of voice, video and data traffic on communications networks. This stock is trading up 7.8% at $14.22 in recent trading.