I have experience in MQL4 programming for more than 2 years. Today I loaded my EA to USDCHF,M30 Chart and after 4 hours
it stopped working although I see the smiley face. I searched in the log file I didn't find any Alert like Zero division or log like uninit.
it is just disappeared.
Can anyone here explain this to me from your experience.
Finally I found the answer it was CPU utilization 100% which stopped one process or thread.
So my advice to you is to check the Task Manger of your hosting system.