Spread
The spread is the difference between the price a broker will buy at and the price it will sell at, the cost built into every quote.
Definition
The spread is the difference between the price a broker will buy at and the price it will sell at, the cost built into every quote.
Charts usually draw one side of the quote, often the bid, so the other side sits a spread away from the candles.
A gap smaller than the spread is a gap in the drawn price that a trader could not have captured in full. This site draws one price series and says which.