I think that should have some way to set trade routes manually. Sometimes the algorithm is kind of dumb, an I have some storages totally full, and the same item missing in other places...
the time could keep passing when you change to another screen... it seems a little idle game like this, and I don't like idle games, but I liked this one
 "City Idle"){kind=icon}
 "Poker Quest RPG"){kind=icon}
 "Electric City Manager"){kind=icon}
 "Dead Zed 2"){kind=icon}
 "Super Energy Apocalypse : RECYCLED!"){kind=icon}
 "Rogue Fable III"){kind=icon}