Online BrokersThere are a few Online Brokers Only, but almost all full-serivce and discount brokers offer online services, they have to in order to compete. Originally Online brokers were designed for frequent traders, those who like to buy and sell often. Most will respond within five minutes of service requests, and are virtually instantaneous with transactions. Many have a large number of no-load mutual funds, with no transaction fees, but the online brokers vary on the number offered. Again, look for hidden fees and fees for small balances or infrequent usage. See if your online brokers quote stock prices in real time or delayed 20 minutes.