Onehorton, other posters may have more websites to give you, but I use "option-calc" and "optionistics" (you know how to finish the web address...yahoo won't let me post it...dummies). With optionistics, go to options tools, and then strike pegger. Both sites will let you choose weekly or monthly opex. They change daily, so I always check at the beginning of each trading day. It's just another tool to help me decide what a stock *might* do. Lately, LVS has really been pretty closely tied to max pain, unless we have news to really tank/rocket the price.