when refreshing a chart,
display an animation of a spinner
(basically a progress bar type animation),
that indicates that something is happening in the background,
and make this spinner appear in each panel in the chart window.
it is probably impossible to calculate the duration of the loading time, so an actual progress bar showing a percentage complete is probably not a possibility, but at least a spinner would give a User Experience (UX) notification that the system has not crashed.
If an indicator has an error, display a graphic image of an yellow exclamation point in that panel, so we don't need to check the Control Center log tab or NinjaScript output to see if something cause the indicator to be blank.
Thank you for your consideration.
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