My final breakout trading prospect is development-stage biopharmaceutical player Aratana Therapeutics ( PETX), which is engaged in licensing, development and commercialization of prescription medicines for pets. This stock is off to a monster start so far in 2013, with shares up a whopping 143%. >>5 Dividend Boosters That Could Really Pay Off If you look at the chart for Aratana Therapeutics, you'll notice that this stock has been downtrending badly for the last month, with shares dropping from its all-time high of $29.32 to its recent low of $18.20 a share. During that downtrend, shares of PETX have been consistently making lower highs and lower lows, which is bearish technical price action. That said, shares of PETX have recently formed a double bottom chart pattern at $18.33 to $18.20 a share. This stock has now started to bounce off that bottom, and it's quickly moving within range of triggering a near-term breakout trade. Traders should now look for long-biased trades in PETX if it manages to break out above some near-term overhead resistance levels at $21.71 to $22 a share with high volume. Look for a sustained move or close above those levels with volume that hits near or above its three-month average volume of 91,260 shares. If that breakout triggers soon, then PETX will set up to re-test or possibly take out its next major overhead resistance levels at $25.50 to $28 a share. Any high-volume move above those levels will then give PETX a chance to re-test or take out its all-time high at $29.32 a share. Traders can look to buy PETX off any weakness to anticipate that breakout and simply use a stop that sits right below that double bottom zone at $18.33 to $18.20 a share. One could also buy PETX off strength once it clears those breakout levels with volume and then simply use a stop that sits a conformable percentage from your entry point. To see more breakout candidates, check out the Breakout Stocks of the Week portfolio on Stockpickr. -- Written by Roberto Pedone in Delafield, Wis.