Is there any way to know if powermatch is functioning while using the Garmin 530 IQ app? That is to say that power is being read from my Stages power meter and not my Tacx Flux S. I find there is a big difference between the two.

Pair your power meter to our app running on your phone and you can then compare the power data in real time and see if they match.

Also, you can use the Status Page (tap the screen and swipe during play) on the Workout Player app and it will show you the powermatch slope and offset that is discovered.