@whale-av Thank you so much!!! Thank you!

Hello!
I would like to switch on a trigger if a specific condition is true. I have 2 variables that I receive come from a Kinect. I tried this expression:

expr if($f1 > 20 && $f1 < 60 && $f2 > 20 && $f2 < 60, 1, 0);

but it really works only on the data flow of the first value, it doesn't really care about the second data flow... Did i wrong some parenthesis/ commas ??
Help!
Thank you very much!