The Ensign: Market Statistics page takes a novel statistical approach to the OHLC data for a script. For those who do not have Ensign, this is a do-alike tool that takes ASCII delimited data as input.
Download from here (use username nms1tr and password traderji when asked). For Windows and uses .Net 3.5 runtime.
Download from here (use username nms1tr and password traderji when asked). For Windows and uses .Net 3.5 runtime.