Definition. Call-Put Delta Skew (Delta 5) is the model-interpolated implied-volatility skew between 5-delta calls and 5-delta puts, reported by tenor. Each datapoint is the difference between call IV and put IV at target delta 5 for the selected asset, exchange, and quote currency.

Technical. Values are taken from a single interpolated IV surface across delta and maturity, then projected onto standard tenors. The skew is unnormalized and expressed directly in IV points as call minus put.