getCurrentCandleData(field = null) - gets the candle info when the field is null - when a field is given, it maps over the candle data, fetching only that prop
getCandleData(index, prop = null, defaultValue = 0) - returns specified index from the candle data - index can be negative - if a prop is given, it maps over the result, fetching only that prop - if the asked index is null, a defaultValue will be returned