Having trouble predicting and timing the direction of volatility and the shape and slope of the skew intraday as well as long term. If I knew where the underlying (futures contract, stock) was going I could easily tell you where volatility and where the OTM calls will be trading relative to the OTM puts volatility-wise. The hardest part is predicting the direction, size and speed of move of the market. This is what mainly determines the theoretical prices of option outrights and how they trade relative to each other. Anyone have a proven system or approach to delta-neutral volatility trading? And how to manage a large inventory of options with different expirations.