The simplest way to ensure that your chosen DEX is secure and functional is to study its smart contract audit report. An audit by a reliable, famous company is a good sign of DEX’s security, though it’s still not a 100% safety guarantee. Next, you should check the SSL/TLS certificate of the DEX’s website. Many DEXs also establish a bug bounty program, giving rewards to coders who find bugs and vulnerabilities; if you see such a program on the DEX website, it means that it’s dedicated to user safety and continuous quality improvements.