It makes sense that you would get filled, since you just pay the offer. But when there's a b/a-spread of $2, do you really want to cross it and pay the offer immediately? You should try to get a better fill first. There's no platform that does what you want it to do I think. What you are looking for, is basically a comparison of prices between the current prices at current spot... and future price at projected spot. To get to that future price is simple, you just re-calc the options price with a different DTE and different spot. The only thing you do not know is what the IV will be, but you can make assumptions about that and incorporate that as well. Just google for black and scholes excel calculator... that will get you started.