Sellers enter a market looking to make as much money as possible by offering a good or service. buyers enter a market looking to spend as little as possible for a good or service. this interaction determines the

Actually this interactions determines the real spot demand and supply process or the cycle in the form of price actions, which keeps on changing every few minutes until a balance or equilibrium is formed between buyers and sellers for their benefits, then again the demand and supply in the form of bidding and asking starts once again from the equilibrium and hence this cycle repeats always.