Not to say it would distract too much from trading. It's hard to calculate the right amount when the price is volatile. I think a proper sweeping system built-in TWS is the proper way to do. IB still lags behind when it comes to forex trading.
Well, aggregating currency amounts one wants to convert, to currency trades one would take anyway, workes just fine for me, because IB allows odd lots for trades above the minimum trade size. I use it every day for conversions and in order to eliminate negative residuals. Of course, I have to admit, that it will only work and generate trading gains, if one has a working forex scalping knowledge and strategy. As I am a forex scalper, no problem for me. But I can understand, that longer time traders, or traders of other instruments without much experience in forex trading have difficulties with it. So no offence, of course it may not work for everybody.
They came back, the small balance came back, it did not work. I don't like talking to IB, and stopped calling.
You were charged a commission and the small balance came back. Do you mean? reached IB staff -> small balance removed, normal commission rate charged -> small balance came back later -> you removed it yourself in TWS, commission charged again This is one of the largest ridicule in the world in which IB charges for a service which fails to do what it does.
IB already has poll item on this here http://www.interactivebrokers.com/en/general/poll/poll.php If you are customer and care about this you can just go there and vote for it on item 6331 under TWS Fx trader