There are various methods to access the functionality of Excel between platforms like IB's TWS as well as TradeStation's Platofrm. Both of these vendors have created DLL's which provide access to thir data and charting functions.
MakeMoney
Not every company can maintain client-vendor relationships. Not sure if that's it, there can be other reasons. Yet 80% of lawsuits are company to company.
I understand he presents at Van Tharp's seminars on trading systems. I too would be interested in knowing other's opinions of such a DVD.
Thx,
MakeMoney