Overtrading and revenge trading

Overtrading means taking far more trades than your strategy actually calls for, often out of boredom or a need for action. Every extra trade is extra fee cost and extra chances for a mistake, with no extra edge to justify it.

Revenge trading is worse: taking an oversized, poorly planned trade immediately after a loss, trying to 'win it back' fast. It replaces a plan with emotion at exactly the moment discipline matters most, and it's one of the fastest ways to turn one loss into a devastating one.