I’m querying the last observation of an InfluxDB time-series measurement, which indicates an up or down trend (if value>0 → positive trend).
Now I want to add an arrow pointing up/down, depending on this value.
So far, I’ve not found a way to do this with Grafana. Currently, I’m using ImageIt for this, with the ImageURL “active_trend.png”. I’m running a separate microservice querying the observation and then renaming either “positive_trend.png” or “negative_trend.png” to “active_trend.png”. This is a very hacky solution that does not work well, since the image is cached by the browser and it takes a while until the new image is visible in the frontend.
I also considered creating a variable that changes based on the value of this observation, however, I did not manage to find out how/if this is possible. Can someone point me in the right direction?
forum, 
