That is real world data. A little research is required to find the reasons behind the trends in the data depicted on that graph. You realize that raw material supply chain disruptions don't necessarily have immediate price impacts on end products right? It takes time for inventories to become depleted etc, and after the lag, the impacts of supply shortages will not necessarily be distributed equally, thus prices will fluctuate and vary from place to place. The primary issue with copper over the past year is in the mining process.
Good read here, if you are interested-
https://www.reuters.com/article/uk-metals-copper-ahome/column-worlds-copper-mines-struggle-to-recover-from-covid-19-idUSKBN29V1E9