A look at the plumbing of markets that explains why prices jump on quiet days and crash on good news — neutral information, but useful for anyone trying to read a chart.

• Every trade has exactly one buyer and one seller, so "more buyers than sellers" can never happen — buy and sell volume always match.
• What moves price is urgency: market orders eat through the resting limit orders in the order book faster than they get replaced.
• Price can move with no trades at all, when market makers cancel their quotes on bad news and everyone reprices lower at once — that is why markets gap overnight.
• "Sell the news" is simple arithmetic: by the time good news lands, everyone who believed it has already bought, so there are no eager buyers left and only holders who can sell.
• A candle is a battle report on which side was more aggressive, not a picture of value; the wick marks where the push ran into enough patient sellers to stop it.

Outlook: The next installment covers liquidity — why price gets pulled toward old highs, old lows, and round numbers.