Could someone explain me the meaning of the Margin slider of the Z Strategies.

My understanding is the following:
- MMax parmeter in the Z.ini file means the max value I can adjust with the slider? (can't test it with the demo version)
- Margin slider value would mean the required Margin per trade
- Margin set to 50 -> means 50 baseunit -> means ca. 0.05 lots?
- but how are the max open trades calultated?
- does the strategy involve the available capital to calculate the max open trades?
- or are number of open trades just based on the strategy and I have to make sure, that anough money is on the account?