Used in the context of general equities. Order to buy (sell) a security which specifies the total amount to be bought (sold) and the amount to be bought (sold) at successively decreasing (increasing) price intervals; often done in order to average the price.
SCALE ORDER
Meaning of SCALE ORDER in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012