When requesting 60-minute candlestick data for Korean shares via the API, there is no data available for the 30-minute period between 15:00 and 15:30 Korean closing time. In contrast, for the US market, although the final 30-minute period from 15:30 to 16:00 (US time) is also 30 minutes, a response to the data request is provided.
It would be preferable if, for the Korean market as well, when requesting 60-minute candlestick data, the 30-minute period at the close were included in the response to the 60-minute request.