The RedFox Copier Pro EA V1.39 is a MetaTrader 4 (MT4) Expert Advisor (EA) designed to provide a solution for trade copying between different accounts. This type of EA is typically used for social trading, where trades made on one master account (also known as the signal provider) are automatically copied to one or more client accounts (known as follower accounts). The "Pro" version often includes advanced features and enhanced performance compared to basic trade copier versions.