What kind of spreads? Calendar or intercommodity?
I am more into grains - you must know of new/old crop spread - and therefore the only spread I can figure with (say) oil is something like december vs. june...
But I here to learn! :)
Then let's be more specific...
1. You need to have Amibroker Professional edition, or at least this is the one I have...
2. There is a specific plugin to allow you receiving TWS data into AB. Both (TWS and IB with plugin) have to run at the same time.
3. AB's plugin allows you to retrieve from...
The minimum size is 25000 USD or equivalent in other currencies. Above that amount there are no "lots": you can trade 26000 USD or equivalent or even 25001 USD...
Things keep coming on my mind as far as the discussion goes on. IB has now a paper trading account: its use is allowed to all those who have opened and funfed a trading account. It allows trading all US tradables as well as Fx on Ideal Pro.