Trading app like tradetron, streak

I'm looking to develop a trading app similar to Tradetron and Streak that would work specifically with Android currently. It should have extensive features for algorithmic trading as well as include specific tools and indicators that I would ask for. Most importantly, it should be able to provide real-time market data and have backtesting abilities. This project will have a major focus on customer experience, so the user interface design should be top notch. Overall, the primary objective of this app is to allow users to invest their funds in markets and make wise trading decisions.