GAX (Goals Above Expectation)
Meaning
Number of goals that are more scored than expected from an average player/team
Interpretation
Shows whether a player/team scores on his attempts better or worse than an average player/team would
Similar to Finishing Ability/Shot Making, which expresses the same in percentages. GAX is rather used for one game, as percentages then can fluctuate significantly. On the other side for multiple matches as for exampe a whole season or tournament percentages are rather used as they are not influenced by the number of shots taken.