  We discuss the scaling laws of both the charged fragments multiplicity
fluctuations and the charge of the largest fragment fluctuations for Xe+Sn
collisions in the range of bombarding energies between 25 MeV/A and 50 MeV/A.
We show close to E_{lab}=32 MeV/A the transition in the fluctuation regime of
the charge of the largest fragment which is compatible with the transition from
the ordered to disordered phase of excited nuclear matter. The size (charge) of
the largest fragment is closely related to the order parameter characterizing
this process.
