U.S. dollar index: The U.S. dollar index was blocked below 105.10 on Tuesday, and supported above 103.55, which means that the U.S. dollar may maintain a downward trend after rising. If the U.S. index encounters resistance below 104.25 today, the target for future declines will be 103.30–102.70. Today, the short-term resistance of the US dollar index is 104.20-104.25, and the important short-term resistance is 104.80-104.85. Today, the short-term support of the US index is at 103.30-103.35, and the important short-term support is at 102.70-102.75.EUR/USD: Europe and the United States fell on Tuesday and were supported above 1.0525, and their rise was blocked below 1.0675, which means that Europe and the United States may maintain an upward trend after a short-term decline. If Europe and the United States fall today and are supported above 1.0610, the target of the market outlook will point to 1.0700–1.0760. Today, the short-term resistance in Europe and the United States is at 1.0695-1.0700, and the important short-term resistance is at 1.0755-1.0760. Today, the short-term support of Europe and the United States is at 1.0610-1.0615, and the important short-term support is at 1.0550-1.0555.Gold: Gold's decline on Tuesday was supported above 1778.00, and its rise was blocked below 1825.00, which means that gold may maintain an upward trend after a short-term decline. If gold's decline today is supported above 1804.00, the target for the market outlook will point to 1831.00–1851.00. Today, the short-term resistance of gold is 1830.00-1831.00, and the important short-term resistance is 1850.00-1851.00. The short-term support of gold today is at 1804.00-1805.00, and the important short-term support is at 1785.00-1786.00.EUR/USD operating strategy: If it falls to 1.0605–1.0615, it can be bought, the stop loss is below 1.0550, and the target is 1.0695–1.0700, 1.0750–1.0755.GBP/USD operation strategy: If it falls to 1.2325-1.2335, it can be bought, the stop loss is below 1.2265, and the target is 1.2460-1.2465, 1.2545-1.2550.USD/CAD operating strategy: If it rises to 1.3615–1.3625, it can be sold, the stop loss is above 1.3700, and the target is 1.3500–1.3505, 1.3450–1.3455.Gold operation strategy: If it falls to 1804.00-1805.00, it can be bought, the stop loss is below 1785.00, and the target is 1830.00-1831.00, 1850.00-1851.00.Summary on December 13: EUR/USD successfully opened a short position between 1.0560–1.0570, the lowest fell to 1.0528, and the short-term profit margin was 20–30 points. GBP/USD successfully opened a short position between 1.2295–1.2305, the lowest fell to 1.2248, and the short-term profit margin was 45–55 points. AUD/USD successfully opened a short position between 0.6775–0.6785, the lowest fell to 0.6751, and the short-term profit margin was 25–35 points. USD/CAD successfully built a long position between 1.3610–1.3620, and the highest rose to 1.3646, with a short-term profit margin of 20–30 points.I would like to remind everyone to pay attention that if the strategy of the day first achieves the expected closing target, investors who seek stability can give up the operation plan of the day. When investors actually implement this strategy, they can start to arrange corresponding positions 5-10 points in advance, but the stop loss price should be executed without compromise.Make an order according to this strategy. When there is a profit of more than 30 points, please protect the parity, and you can also take a profit. Don’t let the profit order become a loss order.Standards for opening a position: risk tolerance is below 20%, 0.1 lot for every $2,000 is enough; risk tolerance is between 20%–50%, 0.1 lot for every $1,000 is ok; risk tolerance is more than 50% , 0.2–0.3 lots per 1,000 US dollars is enough.