Originally posted by Camerus
I was trying a game as Piedmont-Sardinia with the computer handling trade from the get-go, and after about 1 month the comptuer was making extremely ridiculous trades. It was importing hundres of pounds worth of luxury clothing for no reason I could see. This bankrupted a tiny nation like myself, since it happened so quickly I wasn't aware it was going on. Is letting the CPU handle trade worthless?
It isn't worthless, it's priceless. The reason why it decides to buy stuff is because those are needed somewhere: luxury clothing is required for upgrading some pops.
What one should do is disable trades in those expensive goods that aren't needed, like artillery if no war is in sight, glass if you don't plan on building colonies, precious metals to 5-10 if you just plan upgrading pops not buildin trading posts (and zero if you don't think you are upgrading any), ships if you don't want a navy or don't need convoys etc. etc.
As time passes and you become wealthier and start doing more decisions requiring goods it might be easier to let AI handle more. It is especially good in goods you produce little, but need in big lumps like the requirements for railroads. Without it you would have to reset the orders all the time, or wait for ages for your single cement factory to produce needed 50 cement.