Ally Invest vs Scottrade: Trading and Account Fees. Here is a comparison of Ally Invest’s fees vs Scottrade’s fees. You will notice that both online discount brokers have a flat fee structure, and while Scottrade and Ally Invest each charge some of the lowest fees and commissions in the industry, Ally Invest is slightly better priced. Online Stock Trading Sites. Investing online is known as online trading or trading online. It is the process by individual investors and traders buy and sell securities over an electronic network, typically with a brokerage firm. Here I have listed top 10 best online stock trading sites for beginners. 1. OptionsHouse Clients must have at least $500 in a Scottrade IRA in order to open a Scottrade bank account. Customer Service Traders can contact Scottrade using an on-line chat system, fax, e-mail, or phone. The chat and phone service are available 7 days a week. Scottrade has one of the best networks of local branches of any broker in the United States.