With recent economic and market conditions (eg. tariffs), raw material and commodity prices have fluctuated. Some, such as steel (purchased scrap), have fluctuated significantly.

If I want to use a formula for raw material pricing, does anyone suggested a specific "forecast" formula. I am using data from 2016-2018 and forecasting for Q4 2018 though Q4 2019. Currently, I am using =Forecast( , but I notice there are other options. Which is best for the scenario of raw materials and commodities?

Thanks.