Algorithmic Trading

I want to build a trading application that generates buy and sell signals for stocks. You can take part in any of the following modules or in the hole app: -Collect real time data and washing the data before storing to db. -General module to implement many buy/sell strategies. -Backtesting of strategies with reporting and charts. -RealTime trading module for buy/sell signals with charts. -Auto trader with the FIX protocol. This is for my own use and i am open for your ideas.