Can you sell crypto on OKX?

Could you please clarify whether it's possible to sell cryptocurrencies on OKX? I've been exploring various platforms for trading crypto assets, and OKX seems to have a robust reputation in the market. However, I'm still a bit unsure about its selling functionality. Could you provide some insights on this? Is the selling process straightforward? Are there any specific requirements or steps I need to follow? Additionally, how secure is the platform when it comes to selling crypto? I'd appreciate your expert advice on this matter. Thank you in advance for your help!