This Latin American e-commerce stock looks poised for more gains.MercadoLibre (MELI +1.78%) doesn't get as much attention as some of its U.S.-based e-commerce counterparts, but the Latin American e-commerce operator has been a big winner for investors over the years.Since its 2007 initial public offering (IPO), the stock is up 7,000%, and it's been a winner over virtually any time frame during its history, as you can see from the chart below: Recently, however, MercadoLibre has pulled back due to concerns a ...