I have several DCIs for ping times that do not report data if the ping fails and display them on a dashboard, but currently netxms interpolates between all data points, it would be nice if it took the polling rate into account and instead of interpolating a large gap, it would fill the gap with a specific color.
Attached two images how it currently looks like and how I imagined this feature. As you can see on the first image it's barely visible that there were missing pings, but on the second you can tell that at a glance.
There's a feature request for this in our bug tracker: https://track.radensolutions.com/issue/NX-1826
It's sort of low priority, but will be implemented as some point
Currently you may use scripting to collect some specific value if there is no reply, e.g. -10, then it will be visible on the chart.