Now, I know what you're thinking: "Needham? Aren't these the guys that told us to buy LDK Solar and MEMC Electronic all those years ago? That hasn't worked out so well." And you're right. Needham's past stock picks in the solar sector have been pretty abysmal.But while you might not want to take Needham's advice at face value, the analyst's record as a contrarian indicator in this space just might mean you can profit from turning Needham on its head -- sell what it's buying, and buy what it's selling.