An interesting idea Andrew.
For anyone interested, there is a more in depth analysis of that event here (2:28-12:30)
https://britastro.org/video/13862/14769
I was indeed lucky and spent a few more nights without catching anything. An auto system should determine how common they are. What do you plan to trigger on?
Increase in total (or wavelength specific eg blue) flux relative to other field stars ? (Might still be triggered by cloud movement at high cadence)
Increased temperature – flux(blue)/flux(red)? (Should be relatively insensitive to clouds which are ~grey and slow changes due to extinction)
Change in H alpha flux ? (Does H alpha generally change during these events? In this case the excess flux did appear to show some additional H alpha/beta emission). Andy Wilson’s speciality I think
Robin