sentences:  Some may decide to work for a brokerage to get an idea of how the system functions or, as mentioned, to work as a clerk or trade-checker for another person.This is often necessary in order to save money for purchasing a membership which can be expensive, though memberships can be leased on a monthly basis, rather than purchased.Every floor trader (FT) is required to file a completed online Form 8-R and have a fingerprint card.