OHLCV candlestick data. Maximum 300 candles per request.
API key. Request one in #api-key-request on the Graylayer Discord.
Candle duration in seconds
60, 300, 900, 3600, 21600, 86400 ISO 8601 start time
ISO 8601 end time
Candlestick data [[time, low, high, open, close, volume]]