MTE,
Good. Thanks. I'm still not sure about the option market micro structure.
But are you sure IV is 100% function of the market B/S pressure. Don't market makers have some leeway in determining or quoting the IVs?
My point is this: Statvol = function of(market of the underlying), while IV= function of(market of the underlying, market of the options, and market maker's leeway). hence, for the IV case, you are facing more unknown variables making you prone to more errors in betting which way the IV will go.