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Agreed about threshold color coding, as that's the point of using color in these status type of visualizations. Consider ditching green and using neutral when there's no action. Then, for the ones where the user needs to take action on warnings or something bad, use yellow, orange, red to go from bad to worst repectively. This may vary internationally, ...


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If you're using a charting library with your data, you could possibly set up a color rule on the queue series. So if it goes over a certain threshold, it could change color from green to yellow, or another "warning" type color. Here's an example where the bars change color depending on their value: https://www.zingchart.com/docs/json-attributes-syntax/...


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With pie charts, if you have a 500 item queue and 1 item is 'expired' then it simply won't show on the chart - it's just too small. I think we suggested that you use stacked bar charts instead of pies: Data visualization for queued items. The height of the stack can show the length of the queue without crushing the 'expired' items.


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Have you considered overlaying your Down and Unknown state? Here's a low fidelity mockup of what I mean: For point a, it makes sense to know when something is unknown (no data) or down (negative result). For point b, I could see a line graph for the latency then overlay a bar or change the background for times where latency is undefined or the host is ...


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If you are stuck for ideas, I Googled Latency Chart in Google images, so this should give you inspiration. I imagine it will be important to know when latency is high (so that you can do something about it), and it might be important to know when the connection has failed (aka unknown, so that you can investigate). So in both cases you want to ensure the ...


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As you know you're relying on colour to depict up/down which isn't great especially as both types of change are reflected in an upward facing bar. Some ideas 1) Place the change as a label on each bar e.g. -17% or +38% 2) Change to up and down bars and move it up above the tab labels like below 3) Move the negative change bars below the tab labels ...


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Make negative values go below the axis. Your proposed design may gain slightly in the level of precision shown. However, I doubt this really matters. Even if you keep the chart in the same vertical space, I think you will adequately show the differences between bars. Plotting positive and negative values both in the same direction makes the chart a lot ...


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So you're basically replacing the visual variable of position to denote a negative value with the visual variable of colour - this has been termed a 'mirrored' chart. The positives as you're seeing is that it saves space, the negatives are people may not understand it and it may cause some issues for the colour-blind (though red-blue problems are not as ...



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