If you go on any guide that mentions potential profits, the guide will often talk about how the prices of some items are subject to change due to the in-game, player-influenced economy. The selling and buying of items and resources in the Grand Exchange can affect the prices of resources and items in the world. This means that the average price of a gold bar or piece of iron ore might change, but not to worry, they really won’t fluctuate that much. A gold bar is always going to be expensive, and an iron ore piece is going to be pretty cheap. If you want to track and analyze prices for various smithing components every day, then you certainly can, but the changing prices shouldn’t cause too many problems for your bottom line while smithing.