rule based margin calc + stress test (GS prime brokerage?)

Start with basic margin calc used in my 1997 investment, or as described in http://thismatter.com/money/stocks/margin.htm.

Then apply rules. Rule-based calculator recognizes known hedge strategies and picks out each pair (or 3-some ...) of positions in a hedge. These tend to reduce the margin requirement. Known as margin release??

Lastly, apply stress test to simulate worst cases. One of the worst cases is the worst worst. In the worst worst, price can be 5%  worse then normal, so investor's margin requirement should increase 5% to cover that.