Virial ratios of the Orion fibers obtained per region in our survey (see Sect. 5.3). The fibers are further divided in star-forming (with protostars, hatched histogram) and total (with and without protostars, plain histogram). The grey histogram reports the virial ratios for the survey as a whole, along with the median values for the non-star-forming fibers (solid line) and the star-forming ones (dashed line).