Cheapest way to trade AUD/NZD pair with margin?

I use IB, and look like this future is the cheapest one even it is not active at all?
http://www.cmegroup.com/trading/fx/g10/australian-dollar-new-zealand-dollar_performance_bonds.html

 

Trade cash FX for this pair on IB. Easy, liquid. Done it many times and will do again in the pair falls to parity or close.

 

I need leveraging , do you trade fx in ib with leveraging? Look like cme future is cheaper without margin cost, higher leveraging, have solid data to backtest

 

you get more leverage with with an cash broker than with a futures broker

 

if you are trying to arb audusd and nzdusd vs the aud/nzd pair...forget it...no chance

 

How? Future leverage is much higher than ib fx