Hello,
I am trying to understand capital and required capital for Z systems (Z8 and Z9 to be exact).
Let's say capital = 5000. Run a test. Perf report gives us Required capital = 5400.

As I understand, I should run the system live with capital slider = 5000. However, I should deposit at least 5400 to the broker account.
Right?

What's the recommended amount in case of Z9. Is it twice the required capital? Or 10800 is too much?

Do Z systems notify in case of a margin call?