Stocks Trading Basics. Merrill Edge, a subsidiary of Bank of America, has a mobile app that links your banking activity and your brokerage account. If you want to make your own investment decisions but are coming from a beginner knowledge level, Stash is a great choice for your needs. Investopedia is dedicated to providing investors with unbiased, comprehensive reviews and ratings of online brokers. E-Trade is also the owner of OptionsHouse, which has its own powerful app for active traders of stock and options. Recently, the company added support for trading Bitcoin as well. Stockpile lets you buy and sell stocks like most other stock trading apps, but it also allows you to gift single shares of stock or buy fractional shares with a very low cent trade fee.