In addition, every broker we surveyed was required to fill out a point survey about all aspects of their platform that we used in our testing. So clearly Fidelity has spent some time thinking about OTC and pink sheet stocks. Its mobile app and website dashboards are regularly updated with new and useful features. Otherwise, you might pick a lower cost platform to save a few bucks each time you trade. Interested in reading more reviews? Schwab has highly-rated customer service and generally makes it easy to reach a human on the other end of the phone. But Interactive Brokers offers far more trading options, which makes it more attractive depending on your needs.