Lightning Round: Use weakness to buy more of this

It's that time again! The Lightning Round bell has rung, and Jim Cramer gives his take on a few favorite audience stocks:

Agenus: "This stock is up gigantically on its vaccine malaria news, I kind of like it still here. Much more in the pipe."

Windstream Holdings: "Everyone got excited about that REIT decision, and then the stock has come back down. I think it's a fine steady-eddie income producer, but I still prefer AT&T or Verizon."

Home Depot: "There is a rotation of stocks that are hurt by a strong dollar, and into ones that aren't hurt. Home Depot's coming off of that rotation. It could still go down a couple more points before you want to make a move."

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Shake Shack: "It has gone up so much so fast, I wouldn't mind at all if you rang the register and took some money off the table. I don't think that's a bad idea."

Under Armour: "Owning Under Armour is going to require you to be able to accept that there is going to be peaks and valleys. I think that Under Armour is a great stock and it's run by a great guy Kevin Plank, there's a lot to like. But remember right now we are in a down market, and that means that this stock is going to come under some pressure. I would use the pressure to buy, not sell, Under Armour."

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