Currently, X and Y Axis is automatically set to a min/max based on the data values -- even if you have a benchmark value far above the data values.
This prevents the full usefulness of benchmark values -- particularly for goal setting above the "normal" values -- because they don't actually let you see the distance to the goal.
See attached image that shows how this can be misleading.
Suggestion is to either
(1) allow us to override defaults and manually set Max value on each Axis or [ preferred option ]
or
(2) when a Benchmark is added, expand the axis so that it includes this value.
Note: This also applies to charts in Dashboard view.