An interface that facilitates the trading (purchase and sell) of commodities refers to a trading account. Basically, this interface exists between your Trading account and investor's bank. While the number and amount of commodities purchased are shown on the credit side of the Trading account, the same is debited when these commodities are sold to the third party. Before the establishment of online trading markets, the traders were necessitated to purchase and sell commodities on behalf of their client. However, the stockbroker just has to open a trading account to purchase as many commodities they desire on their own behalf.