Hi gsl
Sure, ATUM has a lot of hooks that you can use.
For example, we have an ATUM hook that is triggered just after updating any data from Stock Central. It's this one:
do_action( 'atum/ajax/after_update_list_data', $data );
Where the $data variable contains all the updated data and that you can use to filter whether the stock was updated on that case.
Also, there is a hook that is triggered every time the ATUM's product data is updated and just after we perform the $product->save():
do_action( 'atum/product_data/after_save_data', $product_data, $product );
Any of them could be used for this.
Best Regards,
Salva.