Forex Robot FolowLeaderEA is designed to copy the trading signals from the website You can use robot not only for copy trades form monitoring, but from contests too.
You can look for profitable robots on sites such as The robots that you wish to add to your portfolio should be thoroughly examined and a few factors shall be considered.

Period of time the robot is monitored for
Average profit gain during the time the robot is monitored for
Maximum drawdown
Sharpe Ratio
Profit factor

You can find detailed information and view video about forex robot here: