Hi.

I have a chart with the performance of certain stocks (x=date, y=value). I
add data to this chart weekly, and plot the year-to-date performance as well.
I would like to add grid lines at the start of each year: a vertical grid
line that is linked to a certain date and moves when additional dates are
added. Also, the number of data points between each vertical grid line is not
fixed: it differs per year.

Anybody has a clue how to get this implemented?

Thanks!

Henk-Jan