What a market does
A market brings buyers and sellers together. Price changes as participants agree or disagree on what something is worth at that moment.
Common instruments
A stock represents ownership in a company. An ETF is a basket of assets that trades like a stock. An option is a contract with its own rules, expiration date, and added complexity. Learn stocks and ETFs first before treating options as a shortcut.
Sessions and liquidity
U.S. stocks have a regular trading session, plus premarket and after-hours periods. Fewer active buyers and sellers can make prices move differently outside regular hours. Liquidity simply means how easily something can be bought or sold without a large price change.
Beginner takeaway
Start by knowing what you are trading and when it trades. A clear chart does not remove the need to understand the instrument.