What are the differences between the KRX system and the old system?

Guide to referencing the Average Price displayed on a trading account

Please refer to it here.

How to Clear Your Browser Cache

This action will clear your browser’s cache — the temporary storage that saves files from websites you have visited on your computer. Clearing the cache helps free up storage space, fix display issues, and improve page loading speed, thereby enhancing the overall user experience.
Please refer to the cache clearing instructions here.

How to open an online account?

For Vietnamese individual customer only, if you are Foreign customer or Organizational customer, please click here for Account Opening Instructions
You need a valid citizen identification card, a phone with a camera, and choose one of the following methods to open an account:

Access the link: oap.maybanktrade.com.vn
Maybank Trade VN app: select the “Open Account” section
Scan the QR code:

What procedures for changing from an ID card to a citizen identification card? (For local investors)

According to the regulations of the State Securities Commission of Vietnam, you have to update your latest citizen identification card to avoid affecting your online transactions at MSVN.
Please refer to the guide here