Here's the straightforward truth about the path of exile 2 currency exchange unlock: you need to progress through the main story until you reach a specific point. The game doesn't give you access to trading right away, and there's a good reason for that.
Because there are so many different types of orbs, you need to know their value compared to each other. This comparison is exactly what we mean by path of exile 2 currency conversion. It tells you how many small orbs you need to trade to get one big, rare