(Image source: priceline.com) Priceline.com Inc (NASDAQ:PCLN) shares are rallying today as result of being added to Goldman Sachs “Conviction Buy” list. Goldman also increased the price target to $1,500 a share from $1,260. The upgrade was a result of increase mobile traffic to the site and the improving economic prospect of Europe. In the last quarter, international revenues were a huge driver of overall earnings. Year-to-day, Priceline is up a staggering 87 percent. The acquisition of Kayak, Bookings.com, and Express Deals has been huge for Priceline in terms mobile foot traffic. With the economic picture around the global increasing, there is only upside for Priceline ahead.