Overview of trading Forex online

How a Forex system operates in real time
Online foreign exchange trading occurs in real time. Exchange rates are
constantly changing, in intervals of seconds. Quotes are accurate for the time
they are displayed only. At any moment, a different rate may be quoted.
When a trader locks in a rate and executes a transaction, that transaction is
immediately processed; the trade has been executed.
Up-to-date exchange rates
As rates change so rapidly, any Forex software must display the most up-to-
date rates. To accomplish this, the Forex software is continuously
communicating with a remote server that provides the most current exchange
rates. The rates quoted, unlike traditional bank exchange rates, are actual
tradable rates. A trader may choose to "l0ck in" to a rate (called the "freeze
rate") only as long as it is displayed.