Relative Strength against Index

This is a very simple script to compare the performance of a single stock against its index, by adding / subtracting points for particular price action on up /down - days in the index.
For instance: If the index is down <-1ATR and the stock is not, it's +1 point. If the index is up >1ATR and the stock is up less than half, it's -1 point.

Basic idea (vs the commonly used "relative strength comparison") is that regular relative strength action over a time tells more about accumulaiton than pure price outperformance.

Formula can probably be made better - I'm open to suggestions...