Is there an indicator, or a function of any charting program, that plots volume at time X against the SMA-20 for volume at time X? For example, this indicator will let us know how today's volume at 10:30 am is compared to the average volume at 10:30 am for the past 20 days.
Options: -Bloomberg volume analysis tool OR -For other platforms, you could find a code floating around for that need (or cook it up), it just depends on what software you're using.
Use the SESST (session statistics indicator) on MarketDelta or Investor RT. It's a fabulous platform for doing this sort of thing with OUT custom programming.
You can probably guesstimate it differently: extrapolate today's 10:30 volume to the full day (e.g. multiply it by 3.6), then compare it to the 20 day volume average ...