I am researching to open a trading account and find these articles
http://www.investopedia.com/articles/active-trading/020515/how-robinhood-makes-money.asp
https://www.quora.com/What-is-Robinhood-investings-burn-rate
http://www.investopedia.com/articles/active-trading/020515/how-robinhood-makes-money.asp
https://www.quora.com/What-is-Robinhood-investings-burn-rate