Whilst the alerts function is very helpful for setting absolute trigger values, it seems to be impossible to set an alert to trigger in when a value changes by a -ve %.
For example, I want to trigger an alert when my unique visitors decreases by 25%.
Even if I set the alert to -25% it still triggers whenever the 25% threshold is breached (either +ve or -ve)
If Adobe could add that ad
It's a simple change, but would really uplevel the effectiveness of this function.