Interactive Market Course.
Each candle consists of a “body”: lower side is the opening price, and the upper one is the closing price.
If the chart increased during this period, the opening price is at the bottom, the closing price is at the top, and the candlestick body itself is coloured green (or white).
And vice versa: if the chart goes down, then the opening price is the upper horizontal line, and the closing price is the downside. The very same candle is painted in red (or black).
Notice that a straight line continues up above the candles: this is the wick, and below it is another line, the shadow. These segments reach the level of the highest and lowest quotes that came to the trading platform for the selected period.