Stock Quotes in this Article: BWLD, HMA, SIRO, FLTX

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.

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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.

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

Fleetmatics Group

Fleetmatics Group (FLTX) provides software-as-a-service fleet management solutions for small and medium-sized businesses worldwide. This stock closed up 3.2% at $38.71 in Friday's trading session.

Friday's Volume: 545,000

Three-Month Average Volume: 416,116

Volume % Change: 73%

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From a technical perspective, FLTX bounced notably higher here right above its 200-day moving average of $35.46 with above-average volume. This stock has been downtrending over the last month, with shares falling from its high of $44.52 to Friday's low of $36.71. During that downtrend, shares of FLTX have been consistently making lower highs and lower lows, which is bearish technical price action. That said, shares of FLTX now look ready to reverse its downtrend and enter a new uptrend.

Traders should now look for long-biased trades in FLTX as long as it's trending above Friday's low of $36.71 or above its 200-day at $35.46 and then once it sustains a move or close above Friday's high of $39.46 to $40 with volume that this near or above 416,116 shares. If we get that move soon, then FLTX will set up to re-test or possibly take out its next major overhead resistance levels at $42.25 to $44.50.

Health Management Associates

Health Management Associates (HMA), through its subsidiaries, engages in the operation of general acute care hospitals and other health care facilities in non-urban communities in the U.S. This stock closed up 0.30% at $13.31 in Friday's trading session.

Friday's Volume: 13.96 million

Three-Month Average Volume: 4.53 million

Volume % Change: 450%

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From a technical perspective, HMA bounced modestly higher here right off its 200-day moving average of $13.18 with heavy upside volume. This move is quickly pushing shares of HMA within range of triggering a big breakout trade. That trade will hit if HMA manages to take out Friday's high of $13.33 to some more key overhead resistance levels at $13.57 to its gap-down-day high from last July at $13.66 with high volume.

Traders should now look for long-biased trades in HMA as long as it's trending above some near-term support levels at $13 or at $12.82 and then once it sustains a move or close above those breakout levels with volume that hits near or above 4.53 million shares. If we that breakout hits soon, then HMA will set up to re-fill some of its previous gap-down-day zone from last July that started near $16.50.

Buffalo Wild Wings

Buffalo Wild Wings (BWLD) engages in the ownership, operation and franchise of restaurants primarily in the U.S. This stock closed up 0.46% at $135.47 in Friday's trading session.

Friday's Volume: 438,000

Three-Month Average Volume: 385,902

Volume % Change: 50%

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From a technical perspective, BWLD bounced modestly higher here right above some near-term support at $133.33 with above-average volume. This stock has been downtrending badly for the last few weeks, with shares moving lower from its high of $151.67 to its recent low of $133.33. During that move, shares of BWLD have been making mostly lower highs and lower lows, which is bearish technical price action. That said, shares of BWLD might be setting up to reverse its downtrend and trigger a near-term breakout trade. That trade will hit if BWLD manages to take out Friday's high of $136.70 to some more near-term overhead resistance at $138 with high volume.

Traders should now look for long-biased trades in BWLD as long as it's trending above its recent low of $133.33 and then once it sustains a move or close above those breakout levels with volume that's near or above 385,902 shares. If we get that move soon, then BWLD will set up to re-test or possibly take out its next major overhead resistance levels at $143 to its 50-day moving average of $145.64.

Sirona Dental Systems

Sirona Dental Systems (SIRO) develops, manufactures and markets dental equipment for dentists worldwide. This stock closed up 0.12% at $72.75 in Friday's trading session.

Friday's Volume: 914,000

Three-Month Average Volume: 469,034

Volume % Change: 155%

From a technical perspective, SIRO bounced modestly higher here with above-average volume. This stock has been uptrending strong for the last month, with shares moving higher from its low of $67.20 to its recent high of $73.62. During that uptrend, shares of SIRO have been making mostly higher lows and higher highs, which is bullish technical price action. That move has now pushed shares of SIRO within range of triggering a near-term breakout trade. That trade will hit if SIRO manages to take out some near-term overhead resistance levels at $73.62 to $73.94 and then once it clears its 52-week high at $75.81 with high volume.

Traders should now look for long-biased trades in SIRO as long as it's trending above Friday's low of $72.15 or above $71 and then once it sustains a move or close above those breakout levels with volume that's near or above 469,034 shares. If that breakout hits soon, then SIRO will set up to enter new 52-week-high territory above $75.81, which is bullish technical price action. Some possible upside targets off that breakout are $80 to $85.

To see more stocks rising on unusual volume, check out the Stocks Rising on Unusual Volume portfolio on Stockpickr.

-- 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.