I know a gal from NYC who is a relatively successful trader. She told me about a quantitative analyst who left Two Sigma Investments (7th largest hedge fund), on bad terms, and he just started to anonymously post videos revealing Two Sigma's trading strategy. I don't know the guy's name but my friend said he's totally legit. I just started watching the videos he posted and it's impressive, to say the least. He goes by the name of "Taboo Trader." Here's his YouTube channel: https://www.youtube.com/channel/UCc9G4Y38JlHKYuJQzPqCZvQ