1 The main idea of the international market and investment in each country to could produce goods and services and export them to other countries. 2 The main difference between the internal and external market is the use of foreign currency to pay for goods and services. 3 In an interconnected global economy, customers are given the opportunity to buy the best products at the best prices. 4 open markets, the government allowed its citizens to produce and export those things that they have a better turn out. 5 Trading border will always exist as long as different countries will have different sets of laws