Password strength - How do I get strong rated passwords with a limit of 16 characters?

To create a "fantastic" password, you need to create the password inline with the generator integrated in a password field within 1Password. It must not be a password generated and copy+pasted from elsewhere, even if it is the same 1Password generator but in another 1Password module. For example you create it within the browser plugin, then copy it to the desktop app: this password will not get the highest rating, because the analyzer doesn't know that the pasted password was generated by using truly random characters or words. If you save the password directly within the browser plugin, it gets "fantastic", if you copy+paste the same password to some other entry, it doesn't get fantastic.