  Taking into account the finiteness of the system created in heavy ion
collisions, we show sizable results for the modifications of the chiral phase
diagram at volume scales typically encountered in current experiments and
demonstrate the applicability of finite-size scaling as a tool in the
experimental search for the critical endpoint. Using data from RHIC and SPS and
assuming finite-size scaling, we find that RHIC data from 200 GeV down to 19.6
GeV is only consistent with a critical point at \mu \gtrsim 510 MeV. We also
present predictions for the fluctuations at lower energies currently being
investigated in the Beam Energy Scan program.
