WINDERMERE, Fla. -- 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.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. Vipshop ( VIPS) This company offers high-quality branded products to consumers in China through flash sales on its vipshop.com website. This stock is trading up 8.1% at $14.48 in recent trading. Today's Volume: 213,000 Average Volume: 105,415 Volume % Change: 308% From a technical perspective, VIPS is ripping higher here and starting to enter breakout territory above $14.25 with above average volume. This move today has pushed shares of VIPS into all-time high territory, since the stock has tagged an intraday high of $14.50. Traders should now look for long-biased trades in VIPS as long as it's trending above today's low of $13.50 with strong upside volume flows. I would consider any upside volume day that registers near or above 105,415 shares as bullish. If VIPS can maintain that trend, then the stock has a great chance of trading well north of $15 in the near future. NIC ( EGOV) This company is a provider of eGovernment services which helps governments use the Internet to increase internal efficiencies and provide a higher level of service to businesses and citizens. This stock is trading up 5.7% at $15.50 in recent trading. Today's Volume: 423,000 Average Volume: 185,623 Volume % Change: 256% From a technical perspective, EGOV is gapping up sharply here back above its 50-day moving average of $14.76 with above-average volume. This move is quickly pushing EGOV within range of triggering a major breakout trade. That trade will hit once EGOV mangos to take out some near-term overhead resistance and its 52-week high of $15.80 with high volume.