ARTICLE SYNOPSIS...Holt-Winter Channel Calculation The Holt-Winter formula estimates the three quadratic coefficients recursively as follows: Ft+1 = (l - a) (Ft + Vt + 0.5 At) + aCt+1 Vt+1 = (l - b) (Vt + At) + b(Ft+1 - Ft) At+1 = (l - c) At + c (Vt+1 - Vt) where Ct =