why doesn't seasonal smoothing exist why does exponential smoothing exist? why does exponential smoothing not have trend why does exponential smoothing exist why multiplicative property in exponential smoothing exponential smoothing without trend why does exponential smoothing have seasonality why does exponential smoothing exist only with seasonality why does exponential smoothing exist in season how can exponential smoothing be used exponential smoothing without trend can multiplicative smoothing be additive why exponential smoothing without trend exponential smoothing without seasonality exponential smoothing without seasonality explanation why don't multiplicative models exist why not multiplicative smoothing why does exponential smoothing occur only with seasonality and trend when exponential smoothing does not always have trend why exponential smoothing is not seasonal