Retail forex transactions are normally closed out by entering into an equal but
opposite transaction with the dealer. For example, if you bought Euros with US
dollars, you would close out the trade by selling Euros for US dollars. This
also is called an offsetting or liquidating transaction.
Many retail forex transactions have a settlement date when the currencies are
due to be delivered. If you want to keep your position open beyond the
settlement date, you must roll the position over to the next settlement date.
Some dealers roll open positions over automatically, while other dealers may
require you to request the rollover. Some dealers charge a rollover fee based
upon the interest rate differential between the two currencies in the pair. You
should check your agreement with the dealer to see what, if anything, you must
do to roll a position over and what fees you will pay for the rollover.