Clearing Alerts Manually

Hi- thanks for posting (and for providing such a comprehensive context for your question - it's quite helpful)!

Alerts clear when the datapoint value changes to fall outside of the alert threshold criteria - we don't count No Data as such, because in this case LogicMonitor doesn't actually have a value to compare to the alert threshold criteria.  Because you've defined the valid value range, any value outside of that range is reported as No Data - hence the issue.  Ideally, you'd update your alert criteria such that alerts are only triggered if something is stuck between 50-100%, instead of using the valid value range to control when you receive alerts (as you likely still want monitored data outside of the valid value range).  We're still working on making this easier, but here's a related topic with a solution that I think will work for you too: a href="https://communities.logicmonitor.com/topic/727-alert-floor-in-delta/" rel="">https://communities.logicmonitor.com/topic/727-alert-floor-in-delta/

In general, LogicMonitor alerts are active until monitored data indicates that the issue has cleared - which is why we don't allow the manual clearing of alerts.  You can respond to alerts with an acknowledgement (we recommend you use this to indicate that the cause of an alert is understood and a solution is in progress) or scheduled down time (we recommend you use this to indicate that the cause of an alert is understood, but there is no immediate solution). 

Let us know if you have additional questions.  Thanks!

Sarah