A good online broker goes a long way to making your investing and trading life much efficient. What makes a good online US broker? StockBrokers.com came up with list ranking the online US brokers so that to make investors and traders life much easier. The criteria used in the selection includes:

1. Commissions and Fees
2. Ease of use
3. Platform and Tools
4. Research
5. Customer Service
6. Offering of Investments
7. Education
8. Mobile Trading

The article gives a pretty good break down who does best in each category so its pretty useful... ...