How is the selling price calculated?

Excuse me, could you please clarify how the selling price of a cryptocurrency is determined? I understand that it's not set by a central authority, but I'm curious about the factors that influence its value and how buyers and sellers agree on a price. Is it based solely on supply and demand, or are there other elements that come into play? Additionally, are there any specific tools or algorithms that traders use to calculate the selling price? I'm eager to gain a deeper understanding of this process and how it affects the overall market dynamics.