Im guessing the whole CME will be down in a crash, what are the cheap margin costs hedges? im guessing a crash could also last overnight, what is the cheapest overnight margin hedge?
If you are so bearish, it's better to sell your futures, and later buy again, after the "crash you foresee" All other possiblilities, like hedging with puts, lose more money because of lower liquidity, thus larger bid-ask spreads; and time decay.
i dont mean an index crash, i mean a computer network crash of the CME so that the ES goes down temporarily, so that you get stuck in positions, and then the index moves against you what do you do
You do nothing. What do you expect? If your position has crashed for whatever reason...as in PAST TENSE...short of having a time machine in your garage you're toast.