Firms should submit documents when applying. Traders should have good interpersonal communication skills, team consciousness, experience in placing orders with high frequency or large funds is preferred, and the applicant is an old hand and needs to bring delivery records, so traders should submit delivery orders when applying. A trader is a profession that makes profits by buying and selling the difference. A trader may refer to a trader or a representative of a market maker, and may buy and sell financial products such as stocks and futures.