If a trader has set a profit target before entering trades, so once an obvious is likely to achieve this goal, he immediately issued a "limit order" one article, and out of the deal. There is also the possibility that traders have been letting profits rise until some sign of change in the direction of change in price. In this case, the exit plan may be defined as: "sell at the stop loss point or sell when the index hits the sell signal; Which case comes first and then act on the same way. Regardless of which profit plan is used, it is important for traders to realize that the ultimate goal of the transaction is to accept profits. Unless he decides to try his luck again, he should always keep in mind the clear line that he receives. Many successful traders understand that money is easy to make. The trader who put the money in the back of his mind will eventually experience the painful truth: "trees don't grow up in the sky." There are many types of plans that can be classified according to different criteria. The main classification criteria are: importance of plan, time limit, clarity and abstraction. However, according to these classification criteria, the type of plan obtained is not independent of each other, but is closely related. For example, short - term and long-term plans, strategic plans and job plans, etc. In the near future, the car owner who has changed the gasoline pump or unloaded the gas pump will not panic if there is a gasoline smell in the car. It is likely that the residue has not been cleaned up after the removal of the vehicle. The probability of such a situation is small, and the general replacement cycle of the gasoline pump is 100 thousand kilometers. But the gasoline filter is connected with the gasoline pump. The replacement cycle is shorter and the gasoline pump needs to be removed when replacing. In this case, simply check the installation of the gasoline pump and clean the surrounding area. The market is the economic contact method which is the basic content of Commodity Exchange. Under the condition of commodity economy, the premise of exchange generation and existence is social division of labor and commodity production. Because of the social division of labor, the different producers, respectively, engaged in the production of different products, did not meet the needs of themselves and others and exchange their respective product, so that the general labor products into commodities, make the product production is transformed into commodity production. It is under this condition that the market for goods to be exchanged to meet the needs of different producers is born. Therefore, the market is the product of the division of labor and the exchange of goods under the conditions of commodity economy. The market and commodity economy have inalienable internal relation.