Bad setups occasionally paying out reinforce wrong behavior through dopamine and recency bias.

If those bad trade setups, those trades that you should avoid pay you out every once in a while, bad dopamine keeps you in the game. So when you're taking those C tier setups and you're like, man, these are just slowly bleeding me then one works. Doesn't matter how disciplined you are, how good your strategy is, that dopamine hit can be enough to say, well, I'm gonna keep taking these C plus setups, these C tier setups, excuse me because the last one paid me out, it's recency bias. So sometimes the casino pays you. That's how they keep people in the door. You gotta let them win sometimes. Trading is very similar. Sometimes you get rewarded for doing the wrong thing that can cause you to continue to do the wrong thing rather than what you should be doing which is sometimes doing nothing.