Account Security?

I'm still fairly new to FX trading and using/understanding the MT4 platform, but are there any security concerns with the short and generally insecure passwords used on demo and real trading accounts issued by myFXBook and the various brokers? I see most generate 7-8 character passwords with numbers and letters, no special characters.

I do appreciate that all MT4 - broker communication is encrypted over port-443.

Is there any risk to account passwords getting compromised, brute forced or are there some protections built into MT4?
example: https://www.ecl-labs.org/2013/11/13/metabreaking-metatrader.html (pdf here: https://www.ecl-labs.org/papers/metabreaking-mt4-v6.pdf)

Its from 2013, but I'm not sure how often MT4 updates & auto-patches their software and platforms, maybe these have been addressed?

On my demo and live accounts I have generally changed both the master and investor passwords to ~20 characters with complexity.

If you delete your investor password does that just disable read-only mode, or make it open / read-only for everyone?

Thoughts?

You can just share the screenshot.

I do not think it’s possible. It is better to contact the broker and seek confirmation.

Reach out to your broker's customer support team and they should be able to advise you on this. I think the passwords are pretty safe but you can never be too careful these days.