I am new to EU4 (playing the demo right not) and I am confused about several things:
1) What determines how much money is kept in a node? Can this be changed?
2) Suppose my home port is A, which recieves trade from B, which recieves trade from C. If I send a merchant to C, will he know to transfer trade towards B? What if there are multiple indirect routes from C to A? Will he optimize automatically?
3) Does backflow of trade power work exactly as trade steering, or is there anything different about it? Suppose again that my capital is in A, but now trade flow from A to B to C. If I send back trade power from C to B but I don't have a merchant in B, is it completely useless?
4) If I have trade power in my non-capital node but I do not send any merchant to collect trade, do I get any money from that node?