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.

Ryanair Holdings

Ryanair Holdings (RYAAY - Get Report) , together with its subsidiaries, provides scheduled-passenger airline services in Ireland, the U.K., continental Europe and Morocco. This stock is trading up 1% to $64.87 in Monday's trading session.

Monday's Volume: 253,000
Three-Month Average Volume: 338,711
Volume % Change: 114%

From a technical perspective, RYAAY is spiking higher here back above its 50-day moving average of $64.70 with decent upside volume flows. This stock has been uptrending for the last few weeks, with shares moving higher from its low of $58.96 to its intraday high of $65.57. During that uptrend, shares of RYAAY have been making mostly higher lows and higher highs, which is bullish technical price action. This spike to the upside on Monday is now quickly pushing shares of RYAAY within range of triggering a near-term breakout trade. That trade will trigger once RYAAY manages to take out some near-term overhead resistance levels at $66 to $67.10 with high volume.

Traders should now look for long-biased trades in RYAAY as long as it's trending above Monday's intraday low of $64.80 or above more near-term support at around $62 and then once it sustains a move or close above those breakout levels with volume that registers near or above 338,711 shares. If that breakout hits soon, then RYAAY will set up to re-test or possibly take out its next major overhead resistance levels at $69.43 to its 52-week high of $71.79.

Town Semiconductor

Town Semiconductor (TSEM - Get Report) , an independent semiconductor foundry, manufactures analog intensive mixed-signal semiconductor devices in the U.S., Asia and Europe. This stock is trading up 17.5% to $16.09 in Monday's trading session.

Monday's Volume: 3.76 million
Three-Month Average Volume: 1.24 million
Volume % Change: 735%

From a technical perspective, TSEM is gapping sharply higher here back above its 50-day moving average of $13.73 and into breakout territory above some near-term overhead resistance levels at $14.49 to $15.09 with monster upside volume. This sharp move to the upside on Monday is now quickly pushing shares of TSEM within range of triggering another big breakout trade. That trade will hit if shares of TSEM manage to clear its 52-week high at $16.59 with high volume.

Traders should now look for long-biased trades in TSEM as long as it's trending above Monday's intraday low of $14.71 or above its 50-day moving average at $13.73 and then once it sustains a move or close above $16.59 with volume that hits near or above 1.24 million shares. If that breakout triggers soon, then TSEM will set up to enter new 52-week-high territory, which is bullish technical price action. Some possible upside targets off that breakout are $20 to $25.

Syneron Medical

Syneron Medical (ELOS) , together with its subsidiaries, engages in the research, manufacture, development, marketing and sale of aesthetic medical products worldwide. This stock is trading up 6.1% at $11.78 in Monday's trading session.

Monday's Volume: 356,000
Three-Month Average Volume: 177,851
Volume % Change: 318%

From a technical perspective, ELOS is ripping sharply higher here and breaking out above some near-term overhead resistance at $11.30 with strong upside volume flows. This stock has been uptrending higher over the last few weeks, with shares moving higher from its low of $10 to its intraday high of $11.85. During that uptrend, shares of ELOS have been consistently making higher lows and higher highs, which is bullish technical price action. Shares of ELOS have also seen expanding upside volume during that entire run. This stock is now starting to trend within range of triggering another key breakout trade. That trade will hit if ELOS manage to clear some past overhead resistance at around $12 with high volume.

Traders should now look for long-biased trades in ELOS as long as it's trending above Monday's intraday low of $11.20 or above more near-term support at $10.50 and then once it sustains a move or close above $12 with volume that hits near or above 177,851 shares. If that breakout gets set off soon, then ELOS will set up to re-test or possibly take out its next major overhead resistance levels at its 52-week high of $12.88 to more key resistance at $13.32.

Trex

Trex (TREX - Get Report) manufactures and distributes wood/plastic composite products and related accessories primarily for residential and commercial decking and railing applications in the U.S. This stock is trading up 3.1% at $45.92 in Monday's trading session.

Monday's Volume: 175,000
Three-Month Average Volume: 180,464
Volume % Change: 145%

From a technical perspective, TREX is jumping higher here and breaking out into new 52-week-high territory above some near-term overhead resistance at $45.34 with solid upside volume flows. This stock has been uptrending strong over the last month or so, with shares moving higher from its low of $38.05 to its new 52-week high of $46.24. During that uptrend, share of TREX have been making mostly higher lows and higher highs, which is bullish technical price action. Market players should now look for a continuation move to the upside in the short-term if TREX manages to clear its new 52-week high of $46.24 with high volume.

Traders should now look for long-biased trades in TREX as long as it's trending above Monday's intraday low of $44.60 or above its 50-day at $42.46 and then once it sustains a move or close above its new 52-week high of $46.24 with volume that hits near or above 180,464 shares. If that move gets underway soon, then TREX will set up to enter new 52-week-high territory, which is bullish technical price action. Some possible upside targets off that move are $50 to $55.

-- Written by Roberto Pedone in Delafield, Wis.

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At the time of publication, author had no positions in stocks mentioned. Roberto Pedone, based out of Delafield, Wis., is an independent trader who focuses on technical analysis for small- and large-cap stocks, options, futures, commodities and currencies. Roberto studied international business at the Milwaukee School of Engineering, and he spent a year overseas studying business in Lubeck, Germany. His work has appeared on financial outlets including CNBC.com and Forbes.com. You can follow Pedone on Twitter at www.twitter.com/zerosum24 or @zerosum24.