Tradier, an online broker and provider of API for trading platforms, advisors, developers, and individual investors, agreed to acquire Rho, an active trading mobile app. Financial terms were not disclosed. "Tradier has served Rho as a brokerage partner for years. We are excited to continue on our mission to democratize commission-free mobile experiences as a part of the Tradier team. Together with Tradier, we look forward to continuing to change the way brokerage services are delivered and consumed by Traders," Andre Norman, Rho Founder and CEO.