If you know what you are doing on collective2 it is possible to see what periods of a collective2 strategy is comprised based off of actual fill prices for the leader and/or followers versus the hypothetical fill prices used when a leader is only trading fake money. For example, this strategy had no actual fills for BTO orders until Jun 10th. I think these things should be made more clear on the graphs. My two cents.
Post on how to tell when it starts using the current collective2 design: Basics to Avoid Disaster IMHO