new stat button vs EP

[DrKK]

Hi I am new to making new stats. I am reading the help docs and see that it is quit complicated.
What I want is a stat for the report section which shows the factor of raising an unopened pot from early position and how often someone is raising an unopened pot from the button.

So in this stat position comes in to. While figuring this out some usefull tips are very welcome.
Thanks a lot.

Edit:
so:

PFR button/PFR EP in unopened pots. Or better PFR LP/ PFR EP

I need to make 2, on for 6 max and one for FR. Only might be difficult for tables which are not fully occupied?

[WhiteRider]

You can tell how many players are in the hand:
holdem_hand_summary.cnt_players

There is already a stat "RFI" (Raise First In) which shows when you open the pot with a raise, so you could base your new stat on that.
You get your position from:
holdem_hand_player_statistics.position
This is position off the button, except BB=8, SB=9.

[DrKK]

ok tx :D, this helps