This is because choosing an online broker is something that should be done with care. You need to be able to look at various options that are present and then choose the one online broker that you think will be able to suit you the most.
An online broker is expected to suggest the right kind of trades for you after understanding your needs. While an online broker is not expected to act like a financial consultant, some of the online brokers that you may come across may actually be great with such tips.
Another thing that an online broker should always provide you is detailed analysis of the stocks and trades that you are interested in. In this manner you shall be able to check out the trends in the prices of the stocks so as to make informed decisions about trades.
An online broker is obviously also expected to execute the trades that you order and manage the same from the online trading account that you have created. Do discuss the brokerage and commissions and read the contract carefully for hidden costs before finalizing.