decrease the amount of trade flowing out downstream, by far the hardest to accomplish.
To increase the trade value of a node a player can: How do you maximize trades in Europa Universalis 4? There you should also see the ‘green plus’ button to add all available provinces to a trade company. Go to the trade mapmode and click on the West Africa tradenode. Trade company is a collection of provinces in a trade company region that give the owner less tax, manpower, and sailors, but more trade power, trade goods (including production income) and naval force limit, than if the owner included them in states. The trade value of the goods then enters a system of trade nodes, where it is steered and eventually collected by merchants as trade income. Every province produces trade goods, which give production income to their owner directly.