Allow testing of custom tick data

You could enable us to select a file like the 1m backtest data, but that isn't scaleable.  A better feature would be if you can provide us with a lower level hook into the historical data feed.    

I dream of something like this:

interface CustomDataSource {
   IEnumerable<cAlgoTick> FetchTickData()
}

// Then on our robot, we can implement this interface to pull in any custom data we need.

public class MyRobot : Robot, CustomDataSource {

  public override void OnTick(){
   // Custom tick data comes in through here and the rest of the platform works as usual
  }

  public IEnumerable<cAlgoTick> FetchTickData(){

    // load from tick data files, stream from socket, pull from redis, whatever..

     yield return new cAlgoTick();

  }
}

http://msdn.microsoft.com/en-us/library/9k7k7cf0.aspx

A system like this would be very flexible.  You could even allow us to provide databars (MarketSeries) in a similar fashion.