Hey, thanks for your help. We use check_mk as datasource.
If I use the “mean” option in the legend I just get a pure number and no line because it’s just the legend table itselfe.
If I use the “trasformation” option the calculated value is the same like the normale datasource value. I guess thats because I just have one value at one time (12 o’clock - 21 degree celsius) so both lines (the cmk value and the transformed one) are congruent.
Josef