Soros Fund Management launched when George Soros was 43. Julian Robertson didn’t start Tiger until he was 48. Jim Simons was 50 when he started the Medallion fund. By pretty much any measure, these three belong in the top 5 or 10 best hedge fund managers ever. Things to keep in mind if you haven’t hit your stride by ~30.
Books, videos, quotes... those can explain the importance of emotional discipline in trading.
But it stops there.
They cannot help you at the actual point of friction.
Only a coach with a proven framework can.