Unit root test settings?
Posted: Sun May 13, 2018 8:03 pm
Hello people,
Please pardon my newbie question. My background is strongly technical.
I am trying to find cointegrated forex pairs. According my reading and research this is the step i follow....
1) check each series for stationary (ADF test).( Not sure of the setting here, level, first difference, 2nd difference)
2) using grenger method i use y = c(1) + c(2)*x equation.
3) export tge residuals in another series.
4) check residuals for stationarity again using ADF...
Question:
1) In both cases i am not sure which one to use Level, 1st difference , or 2nd difference.
2) Most test are not cointegrated at level but stationary at 1st level.. what does this mean? Should I be doing this and in what cases?
3) if anyone knows that how will i size my positions.
Thankyou in advance...!!
Please pardon my newbie question. My background is strongly technical.
I am trying to find cointegrated forex pairs. According my reading and research this is the step i follow....
1) check each series for stationary (ADF test).( Not sure of the setting here, level, first difference, 2nd difference)
2) using grenger method i use y = c(1) + c(2)*x equation.
3) export tge residuals in another series.
4) check residuals for stationarity again using ADF...
Question:
1) In both cases i am not sure which one to use Level, 1st difference , or 2nd difference.
2) Most test are not cointegrated at level but stationary at 1st level.. what does this mean? Should I be doing this and in what cases?
3) if anyone knows that how will i size my positions.
Thankyou in advance...!!