Stockcharts premium membership offers excellent customized scanning for a myriad of chart, price and volume data .... For example this list of 23 stocks is experiencing intraday volume today that is greater than 2x yesterday's volume and 4x the 20 day avg volume - AFI AUXO AVAL BBSI BLBD CFCOU CIA COTV FNCX FOXF GEO HBMD JBT LAND MCFT NTRA OCRX PCTI PLCE PPX PRKR TSL ZAGG