In the classical definition, a market maker in exchange trading is a financial institution (firm) that undertakes to provide liquidity of a certain share at the exchange.
It’s rare to meet a man who’s never looked for an extra income. Such a search sometimes takes different forms: someone just finds a second job, someone accumulates savings in the bank and tries to find more favorable conditions for making money, someone invests available funds more risky projects, one of the most popular of which has recently become the Forex market.