"Intraday volatility" refers to the rate at which the price of a financial asset changes within a single trading day. It indicates how much the asset's value fluctuates between its highest and lowest points during that day. Full definition
«This results in significant intraday volatility and causes damage to investors» confidence in the market,» Kolanovic wrote in a note to clients. (businessinsider.com)
We prefer to measure intraday volatility. (modernir.com)