Question

which current is mainly used for international trade

Answer 1

International borders exchange of goods and services in known as trading internationally.

Most countries trade represents significant share of gross domestic product.  

While international trade existed throughout history and economic, social and political importance has been on rise in recent centuries.

Carrying trade at an international level is complex process than domestic trade.

Answer 2

International trade is the exchange of capital, goods, and services across international borders or territories. In most countries, such trade represents a significant share of gross domestic product (GDP). While international trade has existed throughout history (for example Uttarapatha, Silk Road, Amber Road, scramble for Africa, Atlantic slave trade, salt roads), its economic, social, and political importance has been on the rise in recent centuries.