As mentioned by a few traders above, a solid risk management strategy is to risk at most 1-2 % of your total trading capital on a single trade.
It’s also worth mentioning that you should aim for trades with at least a 2:1 or 3:1 reward-to-risk ratio to maintain profitability over time, even if not all trades are winners.
Adopting a balanced risk management strategy can mitigate the ROI impact of a bad run of trades.