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Hi

I want to use ARIMA to forecast. At first I used ADF test and it shows the variable is I(1). But for determining the order of AR and MA when I use correlogram for first difference of variable it shows there is no order of AR and MA. now my problem is how should I estimate ARIMA? and how should I determine the order of MA and AR?

Your variable might be a "white noise" series, in which case you cannot build an ARIMA model.

Your variable might be a "white noise" series, in which case you cannot build an ARIMA model.

I attached data, please find them below and if it is OK please guide me what is the order of AR and MA?