Indicate 'no data' on graph - how to?

[Anonymous]

I have a data set, where it's quite possible that some entities have no data.

The issue is, in my case, when using a bar graph, a low bar indicates good performance. So when entities with no data show up as blank, this is misconstrued as 'really good!'.

I need all entities present on the graph, so I can't simply deselect 'Show items with no data'. I need a way of indicating that the particular entity has no data.

I've tried searching for special indicators on graphs, or even having them display strings (i.e. "Error, no data") but no luck.

Any suggestions much apprciated.