3 Tech Stocks Spiking on Big Volume

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.