I want to sign up for a signal but it says it was rejected - page 2

 
Where can I learn these? This is a well-established site. There are many documents required for application.
 
Mehmet Degirmenci #:
Where can I learn these? This is a well-established site. There are many documents required for application.

you do know how to use a search bar? there is one at top of every page on this "well established (web)site".