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Aims. To demonstrate that `INDICATE' is a powerful spatial analysis toolwhich when combined with kinematic data from Gaia DR2 can be used to robustlyprobe star formation history.  Methods. We compared the dynamic & spatial distributions of young stellarobjects (YSOs) at various evolutionary stages in NGC 2264 using Gaia DR2 propermotion data and INDICATE.  Results. The dynamic & spatial behaviours of YSOs at different evolutionarystages are distinct. Dynamically, Class II YSOs predominately have non-randomtrajectories that are consistent with known substructures, whereas Class IIIYSOs have random trajectories with no clear expansion or contraction patterns.Spatially, there is a correlation between the evolutionary stage and sourceconcentration: 69.4% of Class 0/I, 27.9% of Class II, and 7.7% of Class IIIobjects are found to be clustered. The proportion of YSOs clustered withobjects of the same class also follows this trend. Class 0/I objects are bothfound to be more tightly clustered with the general populous/objects of thesame class than Class IIs and IIIs by a factor of 1.2/4.1 and 1.9/6.6,respectively. An exception to these findings is within 0.05deg of S Mon whereClass III objects mimic the behaviours of Class II sources across the widercluster region. Our results suggest (i) current YSOs distributions are a resultof dynamical evolution, (ii) prolonged star formation has been occurringsequentially, and (iii) stellar feedback from S Mon is causing YSOs to appearas more evolved sources.  Conclusions. Designed to provide a quantitative measure of clusteringbehaviours, INDICATE is a powerful tool with which to perform rigorous spatialanalyses. Our findings are consistent with what is known about NGC 2264,effectively demonstrating that when combined with kinematic data from Gaia DR2INDICATE can be used to robustly study the star formation history of a cluster.

The Spatial Evolution of Young Massive Clusters II. Looking for Imprints of Star Formation in NGC 2264 with Gaia DR2