Eddington-Plakidis test for OGLE-SMC-CEP-1530. The plot shows the distribution of the mean accumulated delays as a function of cycle separation. The black vertical line indicates the break point, with the uncertainty shaded in gray. The linear fit to the distribution terminates at this break point. The cycle separation at the break point, along with the fluctuation parameter calculated from the E–P test, is displayed on the top-left corner.