The costs of trading the securities are in addition to the purchase price of the securities. However, one of the most significant and important costs is the brokerage calculator fee the trader must pay the relevant broker. The broker is paid a brokerage fee as payment for facilitating the transaction. Typically, the brokerage calculator determines the brokerage charge as a percentage of the overall transaction amount. The broker adds this fee to the original transaction value and deducts it from the trader's account.