Expanding window assessment of the pre_simTransComms[,c(2,5)] time series using the univariate autocorrelation and variance early warning signal indicators. The figure is a direct output of the EWSmethods function uniEWS. The top panel depicts the raw time series and the presence of a signal from the annotated indicator. The lower panel visualises the strength of each indicator through time and the threshold level. A signal is indicated when the indicator strength exceeds this threshold value.