====BackTracking===

When your Trigger service is started, it may end up being in the middle of an event. 

If the trigger condition has //already been met// when the program starts, the system doesn't have any idea **when the event began**.

**BackTracking** tries to fill-in-the-blanks by doing a reverse search through history, looking for the most recent time there was a change in the value of your [[condition function|condition]]. 

If found, it will use that time as the start of your event when the [[Range]] function is called.