Looking for insight into Copy Trading and Mirror trading.

Please comment with any information that can help us move towards a good understanding of Copy Trading and/or Mirror trading. There are a couple of ICOs out there that are touting the ability to provide 'copy trading' or 'mirror trading' to its early adopters. While this will be available to everyone at a premium, early investors will have access to this at no additional cost. This got me thinking, are there ALREADY tried and true solutions that help one 'copy trade' or 'mirror trade'?? I mean, im not lazy but I am not against putting my money behind a tried and true day trader that is proven to get X% results on average, right? is anyone?
Ultimately I would like to be able to do it on my own but i dont think there is anything wrong with copy/mirror approaches. Please let me know what you think and if you have any insight that helps in finding a solid source for this DEF! let us know.