Professional traders running mutual funds and hedge funds don't just look at a stock's price moves, they track big changes in volume activity. Often, when above-average volume moves into a stock, 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." These types of traders like to get in well before a bigger trend, so it's always a smart move to monitor unusual volume activity. That said, remember to combine trend and price action with unusual volume.

With that in mind, let's take a look at several stocks that are experiencing unusual volume activity.

Regenxbio

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  • Tuesday's Volume: 543,000
  • Three-Month Average Volume: 172,028
  • Volume % Change: 286%

From a technical perspective, Regenxbio (RGNX) - Get Report ripped sharply higher on Tuesday right above its 50-day moving average of $18.70 a share with strong upside volume. This high-volume jump is now quickly pushing this stock within range of triggering a near-term breakout trade.

Traders should now look for long-biased trades in Regenxbio as long as it's trending above some near-term support at $19.50 or above its 50-day at $18.70 and then once it sustains a move or close above some resistance levels at $22.25 to $23.20 with volume that hits near or above 172,028 shares. If that breakout kicks off soon, then this stock will set up to re-test or possibly take out its next major resistance levels at its 52-week high of $24.55 to $25, or even $27 a share.

This article was originally published on March 8, 2017

Pure Storage

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  • Tuesday's Volume: 9.48 million
  • Three-Month Average Volume: 1.75 million
  • Volume % Change: 554%

From a technical perspective, Pure Storage (PSTG) - Get Report ripped higher on Tuesday off oversold levels with monster upside volume flows. This high-volume move to the upside is now quickly pushing shares of Pure Storage within range of triggering a near-term breakout trade.

Traders should now look for long-biased trades in Pure Storage as long as it's trending above Tuesday's intraday low of $10.07 and then once it breaks out above near-term resistance levels at $10.66 to $11 with volume that hits near or above 1.75 million shares. If that breakout triggers soon, then this stock will set up to re-test or possibly take out its next major overhead resistance levels at its 20-day moving average of $11.29 to its 50-day moving average of $11.48, or even $12 to $12.30 a share.

Calavo Growers

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  • Tuesday's Volume: 892,931
  • Three-Month Average Volume: 205,272
  • Volume % Change: 403%

From a technical perspective, Calavo Growers (CVGW) - Get Report ripped up sharply on Tuesday and briefly trended above both its 20-day moving average of $56.53 and its 50-day moving average of $57.89 with heavy upside volume. This high-volume jump is now quickly pushing this stock within range of triggering a near-term breakout trade.

Traders should now look for long-biased trades in Calavo Growers as long as it's trending above $54 and then once it sustains a move or close above Tuesday's intraday high of $58.50 to $59 with volume that hits near or above 205,272 shares. If that breakout hits soon, then this stock will set up to re-test or possibly take out its next major overhead resistance levels at its 200-day moving average of $61.04 to $61.20, or even $63 to $64 a share.

Century Communities

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  • Tuesday's Volume: 299,863
  • Three-Month Average Volume: 113,962
  • Volume % Change: 167%

From a technical perspective, Century Communities (CCS) - Get Report spiked notably higher on Tuesday and broke out into new all-time-high territory above $24.07 with strong volume. Market players should now look for a continuation move higher in the short-term if this stock manages to clear its new high at $24.50 with strong volume.

Traders should now look for long-biased trades in Century Communities as long as it's trending above some key support at $21.50 and then once it sustains a move or close above its new all-time high of $24.50 with volume that hits near or above 113,962 shares. If that move gets underway soon, then this stock will set up to enter new all-time-high territory, which is bullish technical price action. Some possible upside targets off that move are $30 to $35 a share.

DISH Network

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  • Tuesday's Volume: 12.71 million
  • Three-Month Average Volume: 2.33 million
  • Volume % Change: 470%

From a technical perspective, DISH Network (DISH) - Get Report gapped-up sharply higher on Tuesday back above its 20-day moving average of $61.97 with monster upside volume. This high-volume rip is now quickly pushing this stock within range of triggering a big breakout trade.

Traders should now look for long-biased trades in DISH Network as long as it's trending above some key support around $60 and then once it sustains a move or close above its 52-week high of $64.74 to $65.50 with volume that hits near or above 2.33 million shares. If that breakout hits soon, then this stock will set up to re-test or possibly take out its next resistance levels at $68 to $70, or even $72 a share.

Momo

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  • Tuesday's Volume: 22.32 million
  • Three-Month Average Volume: 2.20 million
  • Volume % Change: 1158%

From a technical perspective, Momo (MOMO) - Get Report gapped-up sharply higher on Tuesday and broke out into new all-time-high territory with monster volume flows. Market players should now look for a continuation move higher in the short-term if this stock manages to print a new all-time high with strong volume.

Traders should look for long-biased trades in Momo as long as it's trending above support levels at $28 or at $27.50 and then once it sustains a move or close above its new all-time high of $30.22 with volume near or above 2.20 million shares. If that move gets underway soon, then this stock will set up to enter new all-time-high territory, which is bullish technical price action. Some possible upside targets off that move are $35 to $40 a share.

This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.