Copy Trade is a service or facilities that help your transaction to be executed automatically base on the trader manager transactions that you follow.
So in this case, there are at least two parties involved. First is the master or provider of copy trade signals. This master or signal provider provides trading signals and be ready to be executed by followers account. Second is copy trade follower. If you have already registered in copy trade service, and you have chosen master copy trade , then you can copy transactions from trader manager.
you should wisely choose a trader manager. don't focus on big profits, but focus on risk management There is info on the copy trading broker provider, some traders (signal providers) use demo account and then give trading signals to be followed , it's too dangerous.
I suggest to check Instaforex Copytrading to get good performance trader manager.