Function parse_candlestick 

pub fn parse_candlestick(
    raw: &OKXCandlestick,
    bar_type: BarType,
    price_precision: u8,
    size_precision: u8,
    ts_init: UnixNanos,
) -> Result<Bar>

Parses an OKX historical candlestick record into a Nautilus [Bar].

Errors

Returns an error if any of the price or volume strings cannot be parsed or if [Bar::new] validation fails.