These compare the current volume for today to the average volume for this time of day.  These all refer to the standard volume numbers, which are reset every night at midnight.

These filters are not available during the premarket.  If you set either of these filters to any value other than blank, you will see no alerts before the open.

These filters use a ratio.  If you set the Max Current Volume to 1, you will only see symbols which are trading on lower than average volume.  If you set the Min Current Volume to 1, you will only see symbols which are trading on higher than average volume.  If you set the Min Current Volume to 2.5, you will only see symbols which are trading on at least two and a half times their normal volume.  If you set the Max Current Volume to 0.9, you will only see symbols which are trading on less than 90% of their normal volume.

These two filters are similar to the high relative volume alert.  All three compare today’s volume to recent historical volume at the same time of day.  There are, however, several important differences:

• The high relative volume alert only looks at volume near the time of the alert.  These filters look at all volume between midnight and the time of the alert.
• The high relative volume alert attempts to find volume spikes.  These filters smooth out the volume.
• The high relative volume filter is only good for high volume.  There is no corresponding low volume alert.  These filters work well with any volume range.