Quote from tobbe:
The pace table/chart I posted was for february. If you used the last 30 days of data, that would explain the difference.
Even if you used data from the same period but from another provider there would probably be some difference (but hopefully smaller). I don't think your average feed vendor (esignal, qcharts, iqfeed, ib etc) spend very much time cleaning their tick data so there's bound to be differences.
For comparison, see the attached pace spreadsheet with IB data, Feb 1 - Feb 29 2008, 8:30-15:00 CST (same data used by tobbe). There are MINOR differences from tobbe's sheet, likely due to different feeds used.
From a PM I got - I thought I'd post the answer here:
I understand the importance of PACE - but can you help me to understand what table, volumepacemak.xls, you've posted is used for?
The table is used to RECALCULATE the VDU, DU, Slow, Medium, Fast, Extreme pace levels. The most immediate application is identifying the NOISE (VDU/DU) levels so we know when to stay out.
During periods of increased volatility, noise level increases, so intuitively, the pace lines have to be adjusted UPWARD in order to keep the trader out of the noise. Conversely, when volatility decreases, so does the noise level, so the pace lines have to be adjusted downward.
By how much do we adjust them? Pasting recent ES data in the spreadsheet gives you the new pace levels.
The choice of data series length and frequency of updates belongs to the user (as always, YMMV

). I use 20-22 days (one month) worth of ES data, 8:40-14:55 CST and I update the levels every two weeks.
The spreadsheet can be used for the same purpose for other instruments or time frames, provided they offer sufficient liquidity (sounds familiar ?

).