Add New Column – Define Equation Variables

When attempting to “Add a New Column” from the Table Column found on the Configure page, I am given the following default options:

Events
Played
Minutes

Outcomes
Win
Loss
Draw
Games Back
Home Record
Away Record
Streak
Last 5
Last 10

Results
Legs (for)
Legs (against)

Can you please define each of these variables and tell me where they get their data from? Are these variables adjustable and can I delete and add my own variables?

Thanks in advance.

https://wordpress.org/plugins/sportspress/