An order (buy or sell order) that flashes (shows) information from an exchange about incoming flow a fraction of a...

A trade (buy or sell order) that flashes information from an exchange about incoming orders a fraction of a second...

The market for securities in which listed securities are traded away from an organized market- i.e., over the counter (OTC)....

The market for securities where institutional investors trade directly among themselves without going through exchanges or resorting to the services...