  The task of experimentally investigating the inherently dual properties of a
supersolid, a simultaneous superfluid and solid, has become more critical
following the recent experimental evidence for supersolids in dipolar
Bose-Einstein condensates (BECs) of $^{164}\text{Dy}$. We introduce a
supersolid order parameter that uses vortex-vortex trajectory correlations to
simultaneously reveal the periodic density of the underlying solid and
superfluidity in a single measure. We propose experiments using existing
technology to optically create and image trajectories of vortex dipoles in
dipolar BECs. We numerically test our observable and find that vortex-vortex
correlations reveal the supersolid lattice structure while distinguishing it
from superfluidity. Our method sets the stage for experiments to use vortex
trajectory correlations to investigate fundamental properties of supersolids
arising from their dynamics and phase transitions.
