SiteCatalyst Alerts - ability to set for either positive or negative changes

[#1]

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.