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.>>5 Dow Dividend Stocks to Beat the S&P 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. >>5 Hated Earnings Stocks You Should Love With that in mind, let's take a look at several stocks rising on unusual volume today. Yandex Yandex ( YNDX) offers access to its search engine through personal computers, mobile phones, tablets and navigation and other digital devices. It operates mainly in Russia. This stock closed up 4% at $29.49 on Wednesday. Wednesday's Volume: 5.21 million
Average Volume: 2.47 million
Volume % Change: 135% >>5 Stocks Poised for Breakouts From a technical perspective, YNDX ripped higher here right above some near-term support at $28 with heavy upside volume. This move has started to push shares of YNDX into breakout territory, since the stock flirted with its previous 52-week high at $29.48. At last check, YNDX hit an intraday high of $29.78 and volume was well above its three-month average action of 2.47 million shares. Traders should now look for long-biased trades in YNDX as long as it's trending above $28 and then once it sustains a move or close above its new 52-week high at $29.78 with volume that hits near or above 2.47 million shares. If that breakout triggers soon, then YNDX will set up to re-test or possibly take out its next major overhead resistance levels at $32 to $34. Any high-volume move above those levels will then put $40 into range for shares YNDX.