Your Deriv MT5 login details are different because Deriv MT5 operates as a separate trading platform. It requires its own set of credentials to connect you securely to the MT5 trading environment.

Here’s the difference:

• Your Deriv login gives you access to your main Deriv account dashboard, deposits and withdrawals, and options trading platforms such as Deriv Trader and Deriv Bot.
• Your Deriv MT5 login is specifically for accessing the MT5 platform and managing trades there.

Think of it as having one master account (your Deriv login) and separate platform access credentials (such as Deriv MT5).