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.

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.

With that in mind, let's take a look at several stocks rising on unusual volume recently.

Willdan Group

Willdan Group (WLDN) - Get Report, together with its subsidiaries, provides professional technical and consulting services to public agencies at various levels of government, public and private utilities, and commercial and industrial firms in the U.S. This stock is trading up 5.3% to $14.00 in Monday's trading session.

Monday's Volume: 99,000
Three-Month Average Volume: 96,992
Volume % Change: 187%

From a technical perspective, WLDN is spiking sharply higher here right above its 200-day moving average of $12.76 with above-average volume. This stock tested the lower-end of its recent range on Monday, and so far the stock has held right around some previous support at $13.20. Shares of WLDN are now starting to trend within range of triggering a big breakout trade above some key near-term overhead resistance levels. That trade will hit if WLDN manages to take out some near-term overhead resistance levels at its 50-day moving average of $14.06 and then above more key resistance at $15.94 with high volume.

Traders should now look for long-biased trades in WLDN as long as it's trending above Monday's low of $13.10 or above its 200-day moving average of $12.76 and then once it sustains a move or close above those breakout levels with volume that hits near or above 96,992 shares. If that breakout begins soon, then WLDN will set up to re-test or possibly take out its next major overhead resistance levels at $16.55 to $18, or even $19.

Rocky Brands

Rocky Brands (RCKY) - Get Report designs, manufactures and markets footwear and apparel under the Rocky, Georgia Boot, Durango, Lehigh, Creative Recreation and Michelin brand names in the U.S., Canada and internationally. This stock is trading up 0.9% at $22.58 in Monday's trading session.

Monday's Volume: 101,000
Three-Month Average Volume: 58,918
Volume % Change: 235%

From a technical perspective, RCKY is spiking higher here right above some near-term support at $21 with above-average volume. This stock recently formed a double bottom chart pattern at $20.67 to $20.45. Following that bottom, shares of RCKY have started to uptrend and the stock is now quickly moving within range of triggering a major breakout trade above some key near-term overhead resistance. That trade will hit if RCKY manages to take out its 52-week high of $23.11 with high volume.

Traders should now look for long-biased trades in RCKY as long as it's trending above support at $21 or above those recent double bottom support levels and then once it sustains a move or close above $23.11 with volume that hits near or above 58,918 shares. If that breakout kicks off soon, then RCKY will set up to enter new 52-week-high territory, which is bullish technical price action. Some possible upside targets off that breakout are $27 to $30.

Lumber Liquidators

Lumber Liquidators  (LL) - Get Report, together with its subsidiaries, operates as a multi-channel specialty retailer of hardwood flooring and hardwood flooring enhancements and accessories. This stock is trading up 2.5% to $17.06 in Monday's trading session.

Monday's Volume: 2.72 million
Three-Month Average Volume: 5.05 million
Volume % Change: 102%

From a technical perspective, LL is spiking notably higher here with decent upside volume flows. This stock has been uptrending over the last few weeks, with shares ripping higher from its low of $27.15 to its recent high of $35.18. During that uptrend, shares of LL have been consistently making higher lows and higher highs, which is bullish technical price action. This spike to the upside on Monday is now quickly pushing shares of LL within range of triggering a major breakout trade. That trade will hit if LL manages to take out Monday's intraday high of $34.85 and then above some big overhead resistance at $35.18 with high volume.

Traders should now look for long-biased trades in LL as long as it's trending above Monday's low of $33.86 and then once it sustains a move or close above those breakout levels with volume that hits near or above 5.05 million shares. If that breakout triggers soon, then LL will set up to re-test or possibly take out its next major overhead resistance levels at $37.78 to just over $40.

This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.