Each summer we vacation several times from the NTX area to the Rocky Mountains. I wave all the RV's along the way. The wave is not like the “Queens’” parade wrist turn or a kid's glad to see you wave, but an open palm facing forward at arm’s length towards the windshield. Not to dissimilar to what the Indians’ did in the old western movies years ago to say "How". Don't hammer me for not being PC, but the history of what they did in the old westerns is the easiest way I know who to describe my wave.