FINAM Group Service www.comon.ru as an example, it offers a strategy for copying trades from many traders who are members of this community. Most large brokers have similar services today.
The main idea is that your portfolio is synchronized with the portfolio of the author of the chosen strategy at your request. You can withdraw from any transaction at any time if you see the risks of capital loss.
It should be understood that by participating in this strategy, you are, in fact, giving your money or part of it into trust management to a private trader, who may build his considerations mistakenly, focusing on his own experience. Be extremely careful and regularly check the status of your account in order to intervene in time if there are signs of a reduction in your account.