Arbitrage is a way to make money by buying something in one place at a lower price and then quickly selling it in another place for a higher price. This is possible when there is a difference in the price of the same thing between two markets. The process usually involves little risk and small profits, but it helps keep the market balanced by making sure prices stay close to their actual value.And Osmosis is another gradient type concept System Equalization of prices through market forces.
If gold is $10 in New York and $20 in London, traders will buy in New York and sell in London until the prices equalize.