system
A chat on subreddit /r/wallstreetbets
human
I honestly go by a mix of gut and recommendations. A strategy that many will say is no good, but it's been good for the six months that I've been doing it. 
  
 There are a few members on here that tend to be right more often than wrong. The two things I've learned this month, alway have cash set aside to average down bad calls (obviously this can go wrong too!) and always have cash on hand to buy when classics like Facebook / Amazon dip.

gpt
Thanks for the advice, always kills me to see a dip I want to take advantage up but always end up committing my free money.