Explanation of Why Buying and Selling Moves Market Prices. Trading: What Makes a Market Move? Markets move based on supply and demand. In practice this is an auction process. The price of a market is where a buyer and a seller have agreed a price and a trade has take place. Markets trade on a centralised exchange example: LSE, NYSE, NASDAQ, NYMEX..etc Forex does not but is priced from a group of banks trading with each other.

Players and participants:
Institutions: Banks, hedge funds, pensions, mutual funds,
Reail - Small trading firms, independent traders, investors
HFT - Algos used to purely scalp small price movements.

What moves a market? A person buys because he thinks the market will go up. He/she is hoping someone will buy the market after he has causing it to keep rising.

[Note: For every buyer there is a seller. So for a market to rise buyers have to become more aggressive than sellers, paying a higher and higher price causing the market to go up]