This indicator plots vertical lines at the scheduled times of US Federal Reserve's FOMC Meeting Announcements. Usually, that time or the 24 hours before and after could see big moves in markets. You can change those dates and times in the settings, and could use the indicator option "Add this indicator to entire layout" if you want to easily reflect that across all panes of a layout. Those lines will show on any symbol you switch to, saving you time and effort of drawing them manually.