A few weeks back when CopyMarkets.com sold for 150,000 Euro at Sedo, some were puzzled as why the name would sell so high. One commenter at TheDomains said the valued the name at $0.
The domain name was not resolving but today it is forwarding to CopyFX.com. The buyer RoboMarkets Ltd.
To learn more about copy trading there is a Wikipedia page you can read.
From the page:
Copy Trading enables individuals in the financial markets to automatically copy positions opened and managed by another selected individuals.
Unlike mirror trading, a method that allows traders to copy specific strategies, copy trading links a portion of the copying trader’s funds to the account of the copied investor.[Any trading action made thenceforth by the copied investor, such as opening a position, assigning Stop Loss and Take Profit orders, or closing a position, are also executed in the copying trader’s account according to the proportion between the copied investor’s account and the copying trader’s allotted copy trading funds.