This might be a very basic question but I'm a newbie to IB and having my initial struggles understanding the TWS Software. My Base cuurency is CAD for my simulated account. I wanted to trade 75K short on USD//CHF. So I was able to buy 75K from the USD/CAD pair from Ideal Pro. My question is now how do I place a trade for shorting USD/CHF. Every time I try shorting 75K USD for CHF, I get the error shown in the attached file. I was told that you can convert from one currency to another on IB i.e. e.g. convert 100K CAD -> USD -> EUR -> CHF -> USD -> CAD Obviously, you don't get your 100K back (more or less), but I'm wondering how I can place such a sequence of trade on IDEALPRO. Any help would be much appreciated.