You probably have a UHD/4K Display and the indicators you are using are probably old or not properly coded to deal with UHD/4K displays!
You will have to contact the authors of the said indicators and request updated versions.
Most likely the scaling setting for the OS. People set it to compensate for the 4k.
Check if your settings are at 100%. I'm guessing they are higher. If so, set them back to 100% and check your MT4 again.