auto selling as a concept is easy... (that said, haven't tried it, can't imagine how it can go wrong though)
you set a threshold and send off a caravan with any and everything above it to somewhere else to sell.
how does auto buying work?
let's say you set a threshold of 1000 and your region has say 500 stored... so the region will automatically send out a caravan to somewhere repeatedly (1 caravan max per destination at a time?) until the threshold is reached?
How can selling go wrong? here is an example
I have set my region to sell to the capital whenever I have more then 200 bushels, at a price of 30 gold. I currently have 450 bushels, I am wondering when the hell the caravan might leave my region. The other question when setting these things up is what does the "amount" setting do? I've set it to 1000 for my example. Does that mean I will only send a caravan when the Warehouse has both more then 200 bushels, and enough to make up my 1000 bushel amount? It is either that or I am selling all 1000 bushels for 30 gold instead of the 30 gold per 100 I assumed.
When I look at "Current Caravans" in the "Send Out Caravans Page" I constantly have the following entry, regardless of what amount of food I have stored
Mission Status Destination Current Location
sell (limit 30 gold) journey, carrying 1000 bushels food Askileon Askileon Purlieus
So I am guessing that the problem IS my setting of 1000 bushels. I guess if I want to sell all food above 200 I need to set "amount" to something like 100, and then it might send a caravan every turn till I reach 200-300 threshold.
On Final bit of info
3 Day ago we had the harvest, at that time I had stored 565 bushels
2 days ago two caravans arrived
One or more caravans reached your region and traded food:
A caravan from Nid Tek gave 541 bushels of food to our warehouse.
A caravan from Santoo gave 295 bushels of food to our warehouse.
I will assume they sold for 0 gold because I have no buy orders set. On that same turn I checked my warehouse, and had a grand total of 537 food. Now the region needs 28 food per day, so I am really hoping the other 870 is on the way to the Capital.