As I scroll down through the replies, I concur that fewer signals are better; which should be indicative of a thorough pregame. Stoppages provide excellent opportunities to speak to your partner(s) and make sure your point is understood as long as they are not repeated or in any way delays resuming play. The only signals I use are the tap of the chest to signal last shot responsiblity and a hand up in the air to prevent the ball being inbounded during a housekeeping moment, i.e., ball boys wiping a wet spot, etc.
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