MC$6/MC$K Configuration in Purchasing-Statistics and Historic Data

Hello Experts,

Can you please give guidance on how to configure this data? Currently I have the below configured. This is based on recommendations from a consultant for quantity and am unsure on a good method for date. Maybe -20, -10, 10, 20. My questions are as follows:

How does this configuration handle items between the stated values in the configuration (example -7 or -20)?

How do I effectively configure the past data to be included to run transactions MC$6 and MC$8? Is it within OLI3? What are the key fields that need to be considered when running this transaction? I am attempting to run an update with a termination date of today for SO12, but I am unsure if this is the correct path forward and if I have the correct criteria selected. Furthermore, when attempting this run in the past, it terminates with a finite amount of documents due to run time.

Quantity:

1 10.0-
2 1.0-
3 0.0
4 10.0