On the IB website it states that the minimum IDEALPRO trade size is $25,000 US. I assume that the trade size you enter in the TWS order dialog is in the selected 'currency' (e.g. JPY for USD.JPY), does this mean the minimum trade size for a IDEALPRO USD.JPY trade is 25000 / (USD.JPY quote)? Have I got this all wrong? If so how does one calculate the minimum trade sizes of different symbols?