hull-ch10-21

Hi, In Reference to HULLCH10_Question 10.5: What is Simplified Approach Equation 10.4 the the solution is referring to here ..? :confused::confused: Question 10.5: Suppose that observations on an exchange rate at the end of the past 11 days have been 0.7000, 0.7010, 0.7070, 0.6999, 0.6970...