[timmaxw]

Most of their hand signals are similar to hand signals used by the Occupy movement [1]. However, the Occupy movement "agree" signal involves wiggling the fingers [2]. It seems to have come from the ASL sign for "applause" [3].

[1] https://en.wikipedia.org/wiki/Occupy_movement_hand_signals [2] https://www.youtube.com/watch?v=HaqpAlvDKsI&feature=youtu.be... [3] https://www.signingsavvy.com/sign/APPLAUSE/7950/1