However, economic, military, political and other fundamental factors need to be considered in actual transactions, which is technically difficult for EA. However, most ea on the market is not made according to successful strategies, but is fitted according to historical data, and the possibility of future profit is very small. It will get twice the result with half the effort to study the successful trading strategy first and then EA. Without a successful trading strategy or a correct understanding of the market, learning EA directly will get twice the result with half the effort.