Feature Request

[cpfinlay]

I thought it would be nifty to be able to alert on specific criteria, but not sure how I would accomplish it. Here's a few use cases that I've considered:

(1) Alert me when a UAT aircraft is above 18,000ft
(2) Alert me when an aircraft has changed altitude abruptly
(3) Alert me when more than nnn military aircraft are picked up at a time or over a specified time period.