I am working on producing a TS workflow. I have annual sales data for several different products. I am trying to forecast future sales data. I am noticing my data is showing linear forecasting and is not using the ETS approach I selected. the charts don't decompose down into seasonality and trends like their supposed to. I was wondering if anyone could explain to me how to fix. Do I need more data for that to occur? Does that analysis require more frequent time interval such as monthly?
