For my search for the horizon chart includes:
|timechart avg(R) as R by T.
I have 18 values of T. However, the horizon chart seems to be limited to 10 rows.
Is there an option to change the number of rows?
I don't know but until you find out, this is the next best thing:
... | timechart limit=10 useother=t avg(R) as R by T.