With $163 billion in trailing-12-month sales, Home Depot (HD -0.77%) is not only the clear leader in the home improvement industry, but it's undoubtedly one of the biggest retailers in the world. Shares have performed well in the past decade, producing a total return of 319%.But as of this writing, they trade 15% below their peak price. This might prompt you to take a closer look at the company. Here are three facts you should know about Home Depot before buying this top retail stock. 1. It's serving an imp ...