First of all, foreign exchange cross is difficult to do, because there is no obvious regularity, which means that it will be more difficult for investors to find a single machine, and they will not be profitable. Even if investors master skilled technical analysis methods, it is still impossible to accurately judge the trend of foreign exchange cross-selling. Secondly, foreign exchange cross is difficult to do because the fluctuation range of foreign exchange cross is often very large. As we all know, if the market changes greatly, it means that the risk is relatively high, so it is difficult to control the income. At the same time, large fluctuations also mean that it will be more difficult for investors to set a stop loss. If the stop loss is set too small, it is often meaningless. Conversely, if the stop loss setting is too large, it also means that investors must have a certain tolerance. Moreover, the risk coefficient of foreign exchange cross is too large, which is also an important reason why few people choose to do foreign exchange cross. Foreign exchange trading can't be a big fat man in one bite. It's best to do it step by step. If you are not sure that you can learn foreign exchange cross-trading, but this method has a high difficulty coefficient, investors should not choose reluctantly under the condition of insufficient ability, but choose the appropriate trading type according to their actual situation.