A maker is a person who makes an order which is not immediately completed. An incomplete order will leave a balance in the chart.
ex) Making is when the current BTC market price is 7,000 USD but a withdrawal order is made at a lesser amount of 6,900 KRW.
A taker is a person who makes an order which is immediately completed. A complete order will not leave a balance in the chart.
ex) Taking is a withdrawal order where an initial withdrawal quote is 7,900 USD with a selling balance of 0.5 BTC is completed immediately.