I have seen 2 different strategies for a straddle when the underlying stock goes up or down a strike. 1. Lawrence McMillan in his book says if it goes up then sell the long put and roll it up a strike. You do the opposite if the stock goes down. You pay a little extra but are assured the value of the strike no matter what happens next. 2. All other books and posts I read said if the underlying goes up you sell the long call and roll it up a strike. I cant decide which is best to use. Anyone know?