First time user of this site. I am looking to calculate volatility of implied volatility for any stock or etf where implied volatility data is available. The IMP_VOLATILITY function only returns closing values. Is there a way to get intraday high and low of Implied Volatility for each day for last 1-6 months? I'd like to use ATR which requires high and low values. Or is there another way to do get intraday high and low of implied volatility?