comparing volume from the current day to the previous day

[felcher]

I would like to quickly look at a chart of the NY and NASDAQ total volume on an intraday basis and be able to compare the current day's volume at a particular time with the previous day's volume at that same time. So what I would like to do is have two horrizontal lines displayed on the chart. One line would be the previous day's volume at the current time of day, while the other line would be the current day's volume at the current time of day. If anyone know's an EFS that can do this or if they can help me write one I would greatly appreciate the help.

thanks for the help,
meng