Could April's worst Nasdaq performers be winners in the long haul? Check out a fresh twist on the classic "Dogs of the Dow" investing strategy.You're familiar with the "Dogs of the Dow" investing strategy, right? Buy blue chip stocks that are down on their luck, indicated by a very high dividend yield. Watch the blue chips get back on their feet and start counting your gains.It's not a magic formula for beating the market, but some investors swear by it. What if we tweak this idea a bit, though? An automate ...