@jrey said in Danger, Latency on WAN mildly loaded:
Marking it as always up hides the when it really down.
Before doing that, I would make sure shaping is properly set up. Follow this guide to set up CoDel.
NB: Waveform can be inaccurate with high bandwidth connections. Balance it against another test like Speedtest. Speedtest doesn't give you a grade like Waveform, but it does give averages under load.