What is formed by the decision of the court that other courts know how to rule on similar cases

Case Law

Case Law is a law that is created by the courts.  

It is the legal term for all decisions on the interpretation of laws made by the courts of a given jurisdiction.

Trade is the buying and selling of goods and services between different countries around the world. Goods that are brought into a country are called imports and those that are sold to another country are called exports. ... Global trade has been made possible through the process of globalisation .