Stock Quotes in this Article: CELG, HTWR, JCOM, KRO

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.

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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 today.
Celgene CELG)

This is a biopharmaceutical company engaged in the discovery, development and commercialization of innovative therapies designed to treat cancer and immune-inflammatory related diseases. This stock is trading up 5.7% at $75.70 in recent trading.

Today's Volume: 5.69 million

Average Volume: 2.42 million

Volume % Change: 315%

Shares of CELG are soaring today after a late-stage clinical trial showed its drug Abraxane improved survival in patients with pancreatic cancer.

From a technical perspective, CELG is gapping up sharply higher here back above its 50-day moving average of $75.69 with above-average volume. This move is quickly pushing CELG within range of triggering a near-term breakout trade. That trade will hit once CELG takes out some near-term overhead resistance levels at $79.75 to $81.24 with high volume.

Traders should now look for long-biased trades in CELG as long as it's trending above its 50-day at $75.69, and then once it sustains a move or close above those breakout levels with volume that hits near or above 2.42 million shares. If CELG triggers that breakout, then look for this stock to trend up towards $85 to $90 in the near future. Keep in mind that any move above $81.24 will push CELG into new 52-week high territory, which is bullish technical price action.

Heartware International HTWR)

This is a medical device company developing a family of implantable Left Ventricular Assist Devices for the treatment of advanced heart failure. This stock is trading up 1.6% at $83.89 in recent trading.

Today's Volume: 192,000

Average Volume: 121,938

Volume % Change: 155%

From a technical perspective, HTWR is bouncing modestly to the upside here right off its 200-day moving average of $81.37 with above-average volume. This move is coming off oversold levels, since HTWR's current relative strength index (RSI) reading is 37. This action is also pushing HTWR within range of triggering a near-term breakout trade. That trade will hit once HTWR manages to clear some near-term overhead resistance levels at $86 to $86.36 with high volume.

Traders should now look for long-biased trades in HTWR as long as it's trending above its 200-day at $81.37, and then once it sustains a move or close above those breakout levels with volume that hits near or above 121,938 shares. If that breakout triggers soon, then look for HTWR to re-test or possibly take out its 50-day moving average of $89.74.

J2 Global JCOM)

This company provides cloud services to businesses of all sizes, from individuals to enterprises. The company offers fax, voicemail, email and call handling services etc. This stock is trading up 2.8% at $30.19 in recent trading.

Today's Volume: 479,000

Average Volume: 332,848

Volume % Change: 129%

Shares of JCOM are moving modestly higher today after the company announced a deal to buy tech trade magazine publisher Ziff Davis for $167 million. The deal includes titles like PCMag.com, ComputerShopper, ExtremeTech, Toolbox.com and Geek.com.

From a technical perspective, JCOM is gapping up here off some near-term support at $29 with above-average volume. This move has seen JCOM briefly challenge its 50-day moving average of $30.59. At last check, JCOM has hit an intraday high of $30.91 and volume is well above its three-month average action of 332,848 shares. This action is also pushing JCOM within range of triggering a near-term breakout trade. That trade will hit once JCOM manages to clear some near-term overhead resistance at $31.07 with high volume.

Traders should now look for long-biased trades in JCOM as long as it's trending above some near-term support at $29, and then once it sustains a move or close above $31.07 with volume that hits near or above 332,848 shares. If that breakout triggers soon, then JCOM will set up to re-test or possibly take out its next major overhead resistance levels at $33 to $33.37. Any move above $33.37 will push JCOM into new 52-week high territory, which is bullish technical price action.

Kronos Worldwide KRO)

This company is a global producer and marketer of value-added titanium dioxide pigments, or TiO2, a base industrial product used in a wide range of applications. This stock is trading up 9.2% at $13.84 in recent trading.

Today's Volume: 1.06 million

Average Volume: 597,200

Volume % Change: 119%

From a technical perspective, KRO is ripping higher here right off some near-term support at $12.65 with above-average volume. This stock has been downtrending badly for the past three months, with shares diving from a high of $18.72 to its recent low of $12.65. During that downtrend, shares of KRO have been consistently making lower highs and lower lows, which is bearish technical price action. That said, KRO is now rebounding and moving close to triggering a near-term breakout trade. That trade will hit once KRO manages to clear $13.74 to $14.28 with high volume.

Traders should now look for long-biased trades in KRO as long as it's trending above $13.74, and then once it sustains a move or close above $14.28 with volume that hits near or above 597,200 shares. If that breakout triggers soon, then KRO will set up to re-test or possibly take out its next major overhead resistance levels at $15.21 to $15.56. Any high-volume move above $15.56 would then trigger a possible move towards $17 to $18.

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.