Reverse operation refers to investors who buy and sell foreign exchange when everyone is bullish and buy foreign exchange when everyone is bearish. If this method is operated properly, it is the most profitable method. The basic idea of the reverse operation method is: under normal circumstances, when most people are optimistic about the foreign exchange market, they should sell it; When most people are bearish on the foreign exchange market, they should buy it. Only in this way can we get better returns.