Type of trade members who take position for short period of time or sometimes for only few minutes are classified as

Type of trade members who take position for short period of time or sometimes for only few minutes are classified as scalpers. A scalper, in the context of market supply-demand theory, also refers to a person who buys large quantities of in-demand items, such as new electronics or event tickets, at regular price, hoping that the items sell out. The scalper then resells the items at a higher price.