To Arkhea...
Please be aware that account types and account values can vary between brokers. A cent account at broker A and a Cent account at broker B may have different values. At MFX a cent account can be started with $5, while at Exness a mini account requires a minimum deposit of $10, so you need to choose a cent type at Exness.
A cent account at MFX, 0.10 lot = $0.01, while at Exness a cent account 0.01 lot = $0.001.
There is no difference between 4 and 5 digits. Because both have the potential for loss or margin call. Therefore, my advice is to choose a broker that suits your financial condition, and you can comfortably trade with the services of the broker used.
Thanks.