MQL4 Reference Working with Events
This group contains functions for working with custom events and timer events. Besides this group, there are special functions for handling predefined events.
Launches event generator of the high-resolution timer with a period less than 1 second for the current chart
Starts the timer event generator with the specified periodicity for the current chart
Stops the generation of events by the timer in the current chart
Generates a custom event for the specified chart
Types of Chart Events