This willingness and ability of buyers to buy the tools that are presented in the financial market. The law of demand is that the lower the price of the tool, the more people want to buy it at such an attractive price. Accordingly, the higher the price, the less the market of those who want to buy at such a high price. The selling price is called Bid (see). This price is always a bit higher than the current, market price. This difference between the prices is called the "spread" (see). This is commission, which is taken by the broker (see) for the opening of your transaction. In contrast to the law of demand, the market also has a law of proposal (see).