ABI                     Activity balance index (ABI)
AUC                     Area Under the Curve
DCCA                    Detrended Cross-Correlation Analysis (DCCA)
DFA                     Detrended Fluctuation Analysis (DFA)
DFA_aux                 Detrended Fluctuation Analysis Auxiliary
                        function
DeltaDFA                log-amplitude Detrended Fluctuation Analysis
                        (DeltaDFA)
Deltarho                Delta Amplitude Detrended Cross-Correlation
                        Coefficient (DeltarhoDCCA)
EEGsignal               A single DFA dataframe with the decimal log
                        fluctuation curve.
IXIC2008                Time series referring to the adjusted closing
                        price of the NASDAQ Composite (^IXIC) during
                        the United States bear market of 2007-2009
LSE.L2008               Time series referring to the adjusted closing
                        price of the London Stock Exchange Group plc
                        (LSE.L) during the period which the United
                        States faced the bear market of 2007-2009.
NYA2008                 Time series referring to the adjusted closing
                        price of the NYSE COMPOSITE (^NYA) during the
                        United States bear market of 2007-2009
SSEC2008                Time series referring to the adjusted closing
                        price of the SSE Composite Index (^SSEC) during
                        the period which the United States faced the
                        bear market of 2007-2009.
SSP                     Self-similarity parameter (SSP)
euclidean               euclidean method for detection of crossover
                        points
lrcorrelation           data frame with log fluctuation channel curve
                        simulated following an ARFIMA process
rhoDCCA                 Detrended Cross-Correlation Coefficient
                        (rhoDCCA)
secant                  secant method for detection of crossover points
