[darawk]

They're probably reviewing these things ex-post, quarterly or something. It's pretty straightforward to do this analysis, i'd say. Look for people that consistently long/short shortly before a substantial favorable dislocation. People doing HF are going to be picking up small dislocation, so a move-magnitude filter weeds them out. No discretionary traders are going to be as consistently correct and consistently well-timed. IMO it'd be a pretty straightforward filter to write.