santu2318 --- I read some of your other posts in a different thread and wanted to tell you that about 3 or 4 years ago I had similar problems with my MT4 platform and finally figured out that it was a .DLL file in the Libraries folder that was affecting my platform. Some .DLL files can be potentially dangerous to your computer. Remove .DLL files from Libraries folder and restart MT4 just see what happens , maybe that will fix your problem. And also if you have any indicators that immediately send you to the sellers web-page when you delete them from your charts , they have been known to negatively affect platforms , try removing them also and restart MT4 , maybe that will help.
If you knew this already , don't mean to offend , just trying to help.