Is it a signal symptom of system (platform) error ?
I suppose if all else fails you could press F8 (or right click on a chart, Properties, and change the colour to whatever you like.

dabbler:
I suppose if all else fails you could press F8 (or right click on a chart, Properties, and change the colour to whatever you like.
it 's right, thank you.
I always see Stoploss lines (either created by EA or set manually) displayed in Red
But my current EA doesn't behavior as before.
When I run it in my desktop, SL lines still displayed in Red.
But in my laptop, the EA created SL lines displayed in Yellow ! (image attached)
I can't understand why just the same EA works in two different ways in two terminals !
I doubt that it 's some error with my laptop or with the version of MT4 in my laptop.
If you have any experience on this case, please explain. Thank you.