I guess this is important since vol is mean reverting. My question is, what data do you use to calculate it? Like say I took the daily HV30 to get the mean. Is that going to tell me where vol is going to revert to in the next 60, 90, or 180 days? No right? Is it as simple as using an HV that is the same time period as what you are predicting for the future? Like if I wanted to speculate where vol would go in the next 60 days, then I would take the mean of HV60 right?