When you want to buy a stock you need an edge, says Jim Cramer

When you want to buy a stock, you need an edge. It's never enough to just say, "You know what? It's time to buy XYZ. I just feel it like the darn thing's a racehorse." A and you don't even know how to read the racing form. There are all sorts of ways to get an edge.I love an edge. Maybe a quality stocks dip because of an overall market decline. Maybe there's some headlines that were wrong.Maybe there's news that you think will be gigantic, but others don't realize it and it pans out. Today, day when the Dow ...