Exponential Trend
Holt-Winters' Two-Parameter Double Exponential Smoothing with an Exponential Trend
Multiplicative Winters' Method with an Exponential Trend
Additive Winters' Method with an Exponential Trend
Damped Trend
Holt-Winters' Two-Parameter Double Exponential Smoothing with a Damped Trend
Multiplicative Winters' Method with a Damped Trend
Additive Winters' Method with a Damped Trend