Trading results which are published to FX Blue are public by default. If someone knows (or can guess) your username, then they can view your results.
You can protect your results by setting a PIN on your account. You do this from the profile page which is displayed immediately after logging in.
Alternatively, you can use the profile page to set up a "white list" of accounts which are allowed access to yours. People can only view your results if they are logged in to FX Blue using one of the accounts on the white-list.