All major brokerage firms provide their clients with on-line services, including trading platforms, latest market & financial news and research.
Customer need to select the site that is best for them. Traders have requirements in a site, while investors have other requirements.
Although most sites are geared to general securities and commodities, however customers may have special needs for the types of products they trade, and the markets in which they trade. For example I use Fidelity for investing. Scottrade for equities trading and ThinkorSwim for option trading
It seems that the most popular firms for on-line investing/trading all of which provide excellent platforms and services are; Scottrade; Chas.Schwab; TDAmeritrade; Fidelity; E-Trade and Thinkorswim.
You can have all the contents currently your account with your present brokerage firm to whomeever you select as you new firm. Just have the new firm provide you with the transfer form (ACATS form), you will sign them, attach a copy of your latest statement. Return them to your new brokerage firm and within 10 days all your account will move to the new firm
from the street