Hey!

Thank you. I understand what you did. Wise solution.

The problem is that the graph have so many lines that is impossible to see anything. I actually was thinking about 2 graphs: one for company prices evolution, in general and other for item prices evolution. The items will be a lot more than the one you see.

I do not have any data actually. So based on these 2 criteria, you can tell me what is the best way for me to start storing the data:

- Evolution of prices of each company.
- Evolution of prices of each item.

The problem for me is: as I cannot quote all items in all companies (some companies do not have that item) its hard to compare the overall prices of each company. It will be like deep statistics. I dont even know if its possible.