Price and available quantity
A candlestick summarizes prices within an interval. It does not describe every quote, cancellation or quantity available along the way. For an execution question, the state and sequence of the order book can matter.
CME’s liquidity methodology examines bid–ask spread, book depth and the cost of trading a specified quantity. When the best price does not offer enough quantity, execution may involve further price levels. [1]
Liquidity depends on participation
Market makers post buying and selling interest, while market takers seek an available execution. The interaction helps explain why the price visible on a screen is only one part of the trading problem. [2]
Ask a more specific question
For research, “is this market liquid?” is often too broad. A more useful question specifies the venue, instrument, time, side and quantity. It also distinguishes observed market data from assumptions about a hypothetical order.
This perspective is relevant to traditional and digital assets. Similar-looking charts can conceal different venue rules and execution conditions. Studying those differences is part of understanding market structure; a visual pattern alone cannot answer an execution question.