The terms of trade, calculated with the export and import unit value indices, give an idea that the country is positively or negatively affected by foreign trade. Because, with the simplest definition, the terms of trade; It is the ratio of the price index of exported goods to the price index of imported goods. Generally, the expectation about the rate of terms of trade is for this value to be above 100%. Although it is not one of the first issues that come to mind in the globalizing world order, the concept of terms of trade, which is related to export and import price indices, is extremely important. With its most basic definition, the terms of trade; It is the ratio of the price index of exported goods to the price index of imported goods. In other words, DTH (terms of trade) provides access to certain ideas as a result of changes in the prices of goods sold and purchased by a country. The most important indicator of the terms of trade in this context is the understanding that the country is affected negatively or positively by foreign trade. Export unit value index and import unit value index are among the factors taken into account in calculating the terms of trade. Because at the beginning of the methods of calculating the terms of trade is to look at the ratio of these two values to each other. In this context, the ratio of the export unit value index to the import unit value index is calculated to reach the terms of trade percentage. The amount of the rate provides an idea about the positive or negative situation of the terms of trade. Thanks to the growth and terms of foreign trade, it is possible to learn the course of the country in the context of foreign trade. The positive effect of foreign trade is the increase in the welfare of the country. On the contrary, the negative impact of foreign trade on the country is the deprivation of welfare gain. The terms of trade ratio below 100 percent indicates that export prices are lower than import prices. On the contrary, the terms of trade ratio above 100% indicates that export prices are higher than import prices. In this context, it can be said that the general expectation is for the terms of trade ratio to exceed 100%.