So, the above can be summarized by pointing out that the trading process works by exchanging one thing for another of equal value, and this value is determined based on the strength of supply and demand for this thing. The trading process has developed over the ages, and in order to obtain the same thing, the counterpart differed in each period from bartering for another commodity, to exchanging it for gold or other metals, and finally exchanging goods for money in its various forms (cash, credit, electronic, or digital).