How about a trade journal that links to all your trades, and then you can make some notes about what you were thinking on any paeticular trade, and what you learned from it, or things to look out for next time, etc.? Would be cool if it had some sort of whiteboard functionality so that you could upload or paste the chart and add some visual aids. Would also be cool if you could Tag your journal entries so that you could group them in retrospect and review your experiences on a particular system / method you were trying, or just for general categorization.