Decide your risk before you enter

The single biggest difference between a disciplined trader and a gambler is when they decide how much they're willing to lose. Professionals set this before entering a trade: position size, stop-loss level, and risk-reward ratio are all decided in advance, not adjusted emotionally after price starts moving.

A stop-loss is an order that automatically closes your position if price hits a level where your original idea is proven wrong, capping the damage. Setting one just below a clear support level, or below the low of the candle that triggered your entry, is a common, disciplined approach.