To make the script level triggered, simply chose for example r22 (Rotor RPM) for the Trigger parameter, and change the script line as shown assuming you want the trace to trigger at RPM>=1000.
While (Parameters(trigger, 0) = 0)
While (Parameters(trigger, 0) > 1000)
There are 10 types of people . . .
Those who understand Binary, and those who don't.