International travelers love that you can use your Schwab Investor Checking ATM card anywhere in the world with no fees. TD Ameritrade Mobile Trader is better for advanced and active investors, as it is loaded with charts, technical indicators and analysis to help you make trade decisions and enter on the go. With roots in Silicon Valley, this brokerage began offering online trades using the Internet via America Online and Compuserve. When trading penny stocks, fees and margins are even more important than with larger stocks — when each share is so low-value, a big fee can take a larger percentage of your trade. Schwab has highly-rated customer service and generally makes it easy to reach a human on the other end of the phone.