On the length of stabilograms: A study performed with detrended fluctuation analysis

► Long CoP trajectories have been analyzed using DFA-1. ► Both position and velocity-type signals have been studied. ► The signal length role is studied with subseries extracted from the original ones. ► The characteristic exponents fluctuate with time along the large series investigated. ► The final part of the x signal shows a persistence larger than expected for small-τ.