How do you check whether gold and real yields are actually moving together on a given day?

Gold is often described as trading inversely to real yields, but the relationship is looser than the textbook version suggests. Over longer windows the correlation has tended to be stronger than over single sessions, and it has broken down during periods of central bank buying or acute risk-off flows. I'm not certain how stable it has been recently, so I'd treat any rule of thumb with caution. When I look at a day where gold and real yields diverge, I try to name the specific driver first: a inflation print, a Fed speaker, a shift in the dollar, or a flow report. Without that, it's easy to attribute every move to the same macro story after the fact. Attaching the move to a named release or event is a useful discipline, even when the link stays uncertain. Where do you draw the line between a real-yield explanation and a dollar or flow explanation when the two point in different directions?