Grains and livestock close mixed Thursday.  Wheat rallies for a 6th day on continued fund short covering and adding war and weather premium.  Can wheat keep moving higher and pull corn above overhead chart resistance? Or does corn have its own emerging story? Soybeans struggle to follow corn and wheat plagued by weak exports.  Cotton steady after the recent implosion of the market, so is the selling done?  Cattle see a nice recovery with steady to higher cash.  Alan Brugler, Brugler Marketing, has analysis.