Nasdaq Explains: What is 23/5 Trading?

Beginning 12/6, all US exchange-listed stocks and ETFs are eligible for 23/5 trading.

For data analysis, this marks a fundamental change in price discovery. Open/High/Low/Close (OHLC) has revolved around the traditional 6.5 hour US trading period but starting 12/6, price discovery would occur almost continuously throughout the global business day.