Nobe OmniScope can calculate MaxFall and MaxCLL HDR statistics in real-time.
The HDR Stats view will display the statistics for both the current frame as well as the global ones (up to this moment). The application will accumulate the calculations as long as the input signal is live and the stats will be updated accordingly.
You can define the mastering level which will be displayed as a target line in the graph.
You can also select the EOTF and color-space when using Gamma SDR or Gamma HDR (Rec.2020, P3 DCI or P3 D65).