To protect and maintain capital in trading, several effective methods can be followed:

1. **Good Planning**: Creating a clear trading plan that defines objectives, strategies, and potential risks. The plan should include how to enter and exit trades.

2. **Risk Management**: Determining the risk percentage for each trade, preferably not exceeding 1-2% of the total capital. This helps to reduce large losses.

3. **Using Stop Loss Orders**: Setting automatic orders to close the trade in case of a certain loss, which helps to limit losses.

4. **Diversifying the Portfolio**: Distributing investments across multiple assets (stocks, commodities, currencies) to reduce risks associated with market fluctuations.

5. **Staying Informed**: Following economic news and market changes, as they can significantly impact prices.

6. **Avoiding High Leverage**: Using moderate leverage to avoid large risks that could lead to significant losses.

7. **Continuous Learning**: Improving skills and knowledge by reading books, attending training courses, and participating in seminars.

8. **Emotional Trading**: Avoid making emotional decisions; decisions should be based on analysis and data.

9. **Performance Evaluation**: Regularly reviewing past trades to understand mistakes and improve future strategies.

By applying these methods, the risks of capital loss can be reduced and the chances of success in trading can be increased.