The disclosed embodiments relate to a system and method for analyzing data. An exemplary method comprises the acts of receiving data corresponding to at least one time series, and computing a plurality of sequential instability index values of the data. An exemplary system comprises a source of data...http://www.google.com.au/patents/US20070191697?utm_source=gb-gplus-sharePatent US20070191697 - System and method for SPO2 instability detection and quantification