An order to buy or sell at the market when a definite price is reached, either above (on a buy) or below (on a sell) the price that prevailed when the order was given.
STOP ORDER (OR STOP)
Meaning of STOP ORDER (OR STOP) in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012