To set up 2FA via an Authenticator app, you will need to install an authenticator of your choice. Once it is set up, come back to eTrader and set up your 2FA!

Click/tap on the Settings tab. 

Click/tap on the toggle button.

Scan the QR code and enter the code provided by your authenticator application.

Click/tap on Enable 2FA.

Your 2FA will now be enabled!