Stock Quotes in this Article: ALLT, UNXL, VCRA

WINDERMERE, Fla. (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.”

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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.

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Allot Communications

Allot Communications (ALLT) provides IP service optimization, monetization and personalization solutions for mobile, fixed and wireless broadband service providers and enterprises. Its products include Allot NetEnforcer and Allot NetXplorer. This stock is trading up 2.6% at $14.22 in recent trading.

Today’s Volume: 1.11 million

Average Volume: 766,181

Volume % Change: 143%

This morning’s news that Oracle (ORCL) has agreed to buy Acme Packet (APKT) has triggered a speculative rally in shares of other companies that make IP networking hardware, including Sonus Networks (SONS), Procera Networks (PKT), Broadsoft (BSFT) and Allot.

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From a technical perspective, ALLT is ripping higher here right above some near-term support at $13.32 with above-average volume. This stock has been trending sideways for the last month, with shares moving between $13.15 on the downside and $14.38 on the upside. This move has started to push shares of ALLT above the upper-end of that recent range. At last check, shares of ALLT have hit an intraday high of $14.66 and volume is well above its three-month average action of 766,181 shares.

Traders should now look for long-biased trades in ALLT as long as it’s trending above $14.38 to $14.66 with strong upside volume flows. I would consider any upside volume day that registers near or above 766,181 shares as bullish. If ALLT can maintain that trend, then this stock will set up to re-test or possibly take out its next major overhead resistance level at around $16.50. Any high-volume move above $16.50 will then set up ALLT to re-fill some of its previous gap down zone from January that started at $19.42.

Vocera Communications

Vocera Communications (VCRA) provides mobile communication solutions focused on addressing critical communication challenges facing hospitals. This stock is trading up 1.7% at $26.53 in recent trading.

Today’s Volume: 163,000

Average Volume: 237,065

Volume % Change: 52%

From a technical perspective, VCRA is bouncing higher here right above its 50-day moving average of $25.54 and back above its 200-day moving average of $26.47 with decent volume. This move is quickly pushing shares of VCRA within range of triggering a near-term breakout trade. That trade will hit if VCRA manages to take out some near-term overhead resistance levels at $26.97 to $27.44 with high volume.

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Traders should now look for long-biased trades in VCRA as long as it’s trending above its 50-day at $25.54 or its 200-day at $26.47 and then once it sustains a move or close above those breakout levels with volume that hits near or above 237,065 shares. If that breakout triggers soon, then VCRA will set up to re-test or possibly take out its next major overhead resistance levels at $28.52 to $30.

UniPixel

UniPixel (UNXL) is a development stage company that has developed, patented and demonstrated a new color display technology in the form of proof of concept prototypes, which it calls Time Multiplexed Optical Shutter. This stock is trading up 3.5% at $13.89 in recent trading.

Today’s Volume: 813,000

Average Volume: 540,814

Volume % Change: 97%

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From a technical perspective, UNXL is spiking higher here right above its 50-day moving average of $12.73 with above-average volume. At last check, shares of UNXL have hit an intraday high of $15.84 and volume is well above its three-month average action of 540,814 shares. This move is quickly pushing shares of UNXL within range of triggering a near-term breakout trade. That trade will hit if UNXL manages to take out some near-term overhead resistance levels at $16 to $17 with high volume.

Traders should now look for long-biased trades in UNXL as long as it’s trending above its 50-day at $12.73, and then once it takes out those breakout levels with volume that hits near or above 540,814 shares. If that breakout hits soon, then UNXL will set up to re-test or possibly take out its next major overhead resistance levels at $18.35 to $18.42. Any high-volume move above $18.42 will then put its 52-week high of $19.67 into range for shares of UNXL.

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

-- Written by Roberto Pedone in Winderemere, Fla.


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At the time of publication, author had no positions in stocks mentioned.

Roberto Pedone, based out of Windermere, Fla., 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.