When MT4 is running, the processing speed of your PC may not be able to keep up with the movement of the indicators and EAs that have been set up, and freezing may therefore occur.
In this case, in addition to increasing the specs of your PC, please try changing the following settings on your MT4 software:
1. Reduce the number of chart screens displayed
2. Reduce the number of indicators and EA settings
3. Reduce the number of charts displayed
and other settings.
Regarding the number of charts mentioned in 3, you can set this from "Tools" -> "Options" -> "Charts" in MT4 screen.
If you still have problems after trying the above, please try uninstalling and reinstalling the MT4 software according to the following procedure.
*When EAs and indicators are installed, it is theoretically possible to restore them by making a backup of the data inside the folder.
To make a backup, please copy the necessary files in the following folder to your own USB memory stick or desktop.
On "File" in the upper left corner of the MT4 screen -> "Open Data Folder" -> a window will open.
*EA (automated trading) files are located in the "Experts" folder in the MQL4 folder.
*Custom indicator files are located in the "Indicators" folder in the MQL4 folder.
(1) Control panel on Windows > [Add or Remove Programs] or
[Programs and Features] > uninstall OANDA-MetaTrader.
Note: Always be sure to click the checkbox [Delete user personal data]
(2) Delete the following folders before installing a new MT4. (The following folders may not exist.)
C:\Program Files (x86)\OANDA - MetaTrader\
C:\Users\\AppData\Local\VirtualStore\Program Files (x86)\OANDA - MetaTrader
Then, empty the trash box in your computer and restart the computer.
(3) Install the latest MT4 after logging in to the actual or demo login page.
(4) Please log in again after installing it.