[Gretl-users] Displaying a time-series continously

Hi all, I recently stumbled upon a feature of an old closed-source econometric package and I was wondering who this feature is called and if this is implemented in an open-source software. The feature is that you could define a certain time-period (day, week, month) and then cycle through the whole time-series with the arrow keys step-by-step and display the defined time-period. So you could check the time-series week-by-week and detect outliers, pattern changes etc. I am just asking if someone knows something similar and how to call this feature, since I couldn't find anything in this regard. Sorry for being a bit off-topic, Johannes