TH, I respect what you do, and think you do what you do the right way. I've also noticed you are very aware and careful with risk management inside your system.
I don't want to hijack the thread away from what you are showing, but did just wanted to ask if you've considered risk coming from totally outside your system?
Eg What if your broker goes broke, due to their own problems or a counterparty's? (If you have all your cash with your broker that is)
Have you considered moving most of it somewhere 100% safe (eg Treasury bills in your name, not in the name of a custodian, and not pooled with the assets of other clients. (I won't bother mentioning gold!

)) and only leaving in what you will need for a day or two trading?