I am interested in finding out more information from other investors about the broker called STG Markets.
Do you trust STG with managing your investments, and have you had any problems with them.
The most important thing to check for when dealing with an binary options broker is a valid license from the government. It could be ASIC in Australia or CySEC in Europe, but they must be licensed.
It looks like STG Markets is based in the Marshall Islands. You can find local brokers, see here.