The E-1 visa is for a citizen of a treaty country who carries out or helps their company carry out “substantial trade” in goods, transportation, or services, including technology, banking, and insurance, between the U.S. and the treaty country. Immigration law doesn’t specifically spell out what is meant by “substantial trade,” so there’s no minimum requirement regarding the dollar value or number of transactions. However, sizable and frequent international transactions are more likely to be approved.