Personal Handicaps (PH)

I found the following from a contributor to this User Group:
To calculate the rating for the selected race against the previous three races I use the following formula:
avebcr(3)*log10(prevbcr)/log10(avebcr(3))

This seemed a good approach so I added 'Rating' to the Columns to be displayed. I have a race 'Rank' (1st, 2nd placing etc) which I assume will be needed to recalculate the PH.

I then (for test purposes) used Edit > Edit Competitor & I set all Ratings to 500 (Had to start somewhere!!)

My question is how do I get the Rating column to display a revised rating after the race seris is scored, and

Having a revised rating, where is this placed to get it revised after the next race series.

Thanks

Pat