To set up alerts in MetaTrader 4, follow these steps:
Open MetaTrader 4 and navigate to the chart where you want to set the alert.
Right-click on the chart to open the context menu.
Select “Trading” from the context menu.
Click on “Alert” from the submenu.
You can also manage and modify alerts by going to the “Terminal” window at the bottom of the MetaTrader 4 interface, clicking on the “Alerts” tab, right-clicking the alert you want to modify, and selecting “Modify” or “Delete”.