The statistical and dynamic behaviors of the displacement-load curves of a high-entropy alloy, Al0.5 CoCr-CuFeNi, were analyzed for the nanoindentation performed at two temperatures.Critical behavior of serra-tions at room temperature and chaotic flows at 200°C were detected.These results are attributed to the in-teraction among a large number of slip bands.For the nanoindentation at room temperature, recurrent partial events between slip bands introduce a hierarchy of length scales, leading to a critical state.For the nanoindentation at 200°C, there is no spatial interference between two slip bands, which is corresponding to the evolution of separated trajectory of chaotic behavior.