Fear & greed
Fear makes you close winners too early and skip valid setups. Greed makes you over-leverage, hold too long, and revenge-trade. Both destroy consistency.
Antidotes: pre-define your entry, stop, and target BEFORE the trade (removes in-trade emotion); risk small enough that no single trade scares you; and accept that losses are a normal business cost. Calm, mechanical execution beats emotional brilliance every time.