# Time Series Stationarity

I am confused of why my Dickey-Fuller test is significant (which implies stationarity), while the time series clearly exhibits a deterministic trend?

• A deterministic trend does not seem that clear to me. A linear trend --which is the kind of trend considered in the regression model of the Dickey-Fuller test-- is not observed as an overall long-term pattern. The local-level model can be helpful to analyse your data. For software implementing this model you may see these papers. For an illustration you may also see for example this application to temperature trends. – javlacalle Dec 22 '14 at 20:37