NOTE:you can maximum open 200 order and if your order's can't filled at target, you get very big DD% or even MC, that mean you have 5 pair with maximum 200 position on all,you must close your order before reach 200
or
you can also open for each pair a account, that mean you have for each pair 200 position
hope it help

Do you mean MaxTrades? I don't know but I think if you set the 'Compound' to false mode it would open as many trades as possible.
My highest open trades was around 35, so my opinion could be wrong.