In forex, candles refer to the candlesticks charts. They are graphical representations of the currency price movements over a certain period of time and look in the form of candles. Each candle represents four points—open, close, high, and low.
Open: it represents the price at which the market opened for that period.
Close: it represents the price at which the market opened for that period.
High: it represents the highest price the currency pair touched for that period.
Low: it represents the lowest price the currency pair touched for that period.
Candles are filled with green and red colours. If there are more green candles than the red ones, then the market is in an upward trend; if there are more red cadles than the green ones, then the market is in a downward trend. There are different timeframes to see candle charts, including 1minute, 5 minutes, 1 hour, and 1 day.