system
A chat on subreddit /r/wallstreetbets
human
Based on the expected move shown in the TastyWorks app. I believe their system uses the formula-based approach to calculate it: (stock price) * IV * sqrt(DTE/365).

gpt
Yeah, I asked because that percent lined up with the put prices... But that's one sided, obviously the calls were inflated on the positive side.  Hard to expect either to come to fruition though, it was just maximum price/percentage people were willing to speculate.