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.

Baidu

Baidu (BIDU) - Get Report provides Internet search services. This stock is trading up 4.3% to $213.93 in Friday's trading session.

Friday's Volume: 4.48 million
Three-Month Average Volume: 3.01 million
Volume % Change: 232%

From a technical perspective, BIDU is ripping higher here back above its 200-day moving average of $209.29 with strong upside volume flows. This stock gapped down sharply lower on Thursday from around $220 to its low of $199.70 with heavy volume. Following that move, shares of BIDU have now rebounded higher and filled most of Thursday's gap. This jump to the upside on Friday is now starting to push shares of BIDU within range of triggering a near-term breakout trade. That trade will hit if BIDU manages to take out some near-term overhead resistance levels at around $220 to its 50-day moving average of $224.13 with high volume.

Traders should now look for long-biased trades in BIDU as long as it's trending above Friday's intraday low of $207 and then once it sustains a move or close above those breakout levels with volume that hits near or above 3.01 million shares. If that breakout materializes soon, then BIDU will set up to re-test or possibly take out its next major overhead resistance levels at $230 to $234.67, or even $237.43.

Flexion Therapeutics

Flexion Therapeutics (FLXN) - Get Report , a specialty pharmaceutical company, focuses on the development and commercialization of anti-inflammatory and analgesic therapies for the treatment of patients with musculoskeletal conditions. This stock is trading up 3.7% to $21.80 in Friday's trading session.

Friday's Volume: 701,000
Three-Month Average Volume: 94,103
Volume % Change: 1370%

From a technical perspective, FLXN is trending higher here right off its 50-day moving average of $20.87 with monster upside volume flows. This spike to the upside on Friday has now pushed shares of FLXN above a key downtrend line. Shares of FLXN are now starting to trend within range of triggering a much bigger breakout trade above some key near-term overhead resistance levels. That trade will hit if FLXN manages to take out some key near-term overhead resistance levels at $23.79 to its all-time high of $24.48 with high volume.

Traders should now look for long-biased trades in FLXN as long as it's trending above its 50-day moving average of $20.87 or above more near-term support levels at $20 to $19.08 and then once it sustains a move or close above those breakout levels with volume that hits near or above 94,103 shares. If that breakout hits soon, then FLXN will set up to enter new all-time-high territory above $24.48, which is bullish technical price action. Some possible upside targets off that breakout are $30 to $35, or even $40.

LogMeIn

LogMeIn (LOGM) - Get Report provides cloud-based collaboration, IT management and customer service offerings to address the multi-device security, management and accessibility requirements of the new mobile workplace in the U.S., the U.K., and internationally. This stock is trading up 8.1% to $51.95 in Friday's trading session.

Friday's Volume: 611,000
Three-Month Average Volume: 253,510
Volume % Change: 416%

From a technical perspective, LOGM is gapping sharply higher here back above its 50-day moving average of $48.71 with strong upside volume flows. This large spike to the upside on Friday has now pushed shares of LOGM into breakout territory, since this stock has taken out some near-term overhead resistance levels at $49.66 to $49.94 and $50.57. Shares of LOGM are now quickly moving within range of triggering a much bigger breakout trade. That trade will hit if LOGM manages to take out some key near-term overhead resistance levels at $53.19 to its 52-week high of $53.38 with high volume.

Traders should now look for long-biased trades in LOGM as long as it's trending above its 50-day moving average of $48.71 and then once it sustains a move or close above those breakout levels with volume that hits near or above 253,510 shares. If that breakout triggers soon, then LOGM will set up to enter new 52-week-high territory above $53.38, which is bullish technical price action. Some possible upside targets off that move are $60 to $65.

-- 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.