Foreign exchange quotation is generally a two-way quotation, that is, the quotation party quotes its own buying price and selling price at the same time, and the customer decides the buying and selling direction by himself. The smaller the difference between the buying price and the selling price, the smaller the cost for investors. The quoted price difference of foreign margin trading is basically 3-7 points, that of Hong Kong is 6-8 points, and that of domestic banks is 10-40 points.
As the protagonist of the foreign exchange market, the US dollar is often used as the base currency in foreign exchange quotations. Dollar pricing method refers to the international foreign exchange transactions, the inter-bank quotations are usually based on dollars to express the prices of national currencies. In the 1950s, the international financial market began to adopt the US dollar pricing method, and the exchange rates of European countries were still based on the US dollar exchange rate. The foreign exchange quotations of some big banks in the international financial market are also published in US dollars against other major currencies.