Calling an illegal screen

[zeedonk]

I've found that I have to sloooooowww down on this one. Most people/players/coaches don't know the team control foul signal. What I have done is hit the whistle-fist up-point direction and "offense" at the same time-spot the ball- report. What I am TRYING to do is the above HS mechanic, and I'm trying not to look like I'm landing planes...

Problem is, slowing down takes me out of my "flow", which I'm sure equals "not approved mechanics". Makes me look like I'm unsure of the call.

Our board is making an effort to ensure that we young'uns don't point- use an open hand (as in violation and keeping the thumb tucked in the palm)


Question- Making this call as the trail-> what do your local boards want you to do? Is this a "long switch" which, for us, is a no-no?