system
A chat on subreddit /r/wallstreetbets
human
Help me, I'm retarded. What's the purpose of looking at the trades considered unusual?

gpt
Insider trading (buying/selling stocks on non-public knowledge) is illegal because you can make tons of profit, among other reasons. However, people still do it anyways because they think they won't get caught. 
  
 OP's script is looking for unusual activity (what he thinks could be insiders) and alerts him of it.