Speculation of exchange rate should follow rule one: holding positions, lightening positions and making profits. These three points are practical guarantees. This requires investors to pay close attention to market changes and make judgments, but also have the courage to place orders. Speculation of exchange rate should follow rule 2: buy up and not buy down. This is the safest trading strategy. The price increase is only a small process that can go wrong, that is, when the price rises to the peak, the exchange rate rises from the floor to the ceiling and cannot rise any more. Speculation of exchange rate should follow rule three: overweight. After buying the currency first, the currency exchange rate rises. If you see the right investment, if you increase the investment, you should follow the principle of "increasing the number of times less than last time". This number will gradually increase and buy more foreign exchange trading technical analysis methods based on prices, statistics based on historical data, mathematical calculations, charts and other major means to judge the future market. If it is not clear, you can also consult a professional analyst:/