Thank you, that's perfect.
However, I still have problems to display the whole data by using setDisplayPeriod. If I use the method specifying "max" and I have "day" as unit, the chart does not show the whole set of data, but only the last 6 months (more or less).
The series loaded contains at least 2 years: is there a sort of limits If i try to display the whole data using a unit too small?
Moreover: is there a way to keep keep the period displayed in x axis fixed? I mean, if I scroll back I don't want that the zoom is applied.
thank you!