Am I missing something here? I very well could have a mistake since I don't fully grasp the P123 settings yet.
Appreciate any feedback.

The NHNLp screen contains the line "Price > HighVal(251,1)".
Highval(251,0) is the high price over the last 251 days including today.
Highval(251,1) is the high price over the last 251 days excluding today (lag of 1).
"Today" is the date through which P123 price data has been incorporated.

You can find the update status of the P123 servers on their "system status" page.
"Manage", then "Dashboard", then click on the three colored dots. Right now, it says (and note, it is running the weekend update right now):

System Status
 Price Data 07/24/26
 Fundamental Data 07/24/26
 Estimate Revision Data 07/18/26
This only includes a small subset of Estimates data. It only applies to the 18 factors under "EPS Revisions" which are updated weekly.
 Server StatusReady (optimal: 8 of 8 servers available)
 Interactive Brokers NOT Connected

Data Update Schedule
Name	Description	                                            Last Start	         Database Update	Server Update
EARLY	Early update. Runs Sun-Fri starting around 10 PM	07/24/2026 9:59 PM	07/24/2026 10:04 PM	07/24/2026 11:23 PM
LATE	Late update. Runs Tue-Fri starting around 3:00 AM	07/24/2026 3:00 AM	07/24/2026 3:01 AM	07/24/2026 4:16 AM
MON	Early Monday Final Weekend Data. Starts 3:30 AM	07/20/2026 3:30 AM	07/20/2026 3:31 AM	07/20/2026 4:43 AM
SAT	Saturday full load. Starts around 11 AM	07/25/2026 10:00 AM	07/25/2026 10:02 AM	Running...

This gives nice visibility into the data update status. The table in my earlier post is essentially with lag 0.
Meaning, the NHp and NLp values for 7/23/2026 are based on data through the close on 7/23/2026.
You could not produce these values until late in the evening on 7/23 at the earliest.

Mark