MT4 does not have a standard MTF crosshair (why not?) like many other platforms....but there are a few you can use (made by other coders). I like as example this MTF screen with the crosshair at 5M and showing the orange vertical line at MTF's, perhaps it does ring a arrow/bell; 5m=magenta, 15m=gold, H1=aqua, H4=black etc. Not only the arrows (semafors) but also the path to the 'extreme/semafor'