To predict where a stock might trade at a year from now, you use a formula based on HV, stock price x IV, and that provides an assumption of where the stock might trade at a year from now.
When calculating this for an option, you add the square root of the option life span divided by 365 at the end.
When doing the calculation for the option, do you use the stock price or the strike price of the option x by the options IV or the stock's IV?