Cumulative differential chemical assay identification

Apparatus for cumulative differential chemical assay identification, comprising:

• a value receiver, configured to receive a plurality of fluorescence values measured during a chemical reaction involving a test sample, each one of said fluorescence values pertaining to a respective one of a first series of physical parameter values;
• a difference calculator, in communicated with said value receiver, configured to calculate a plurality of pairwise differences, each difference being between a respective one of said measured fluorescence values and a respective one of reference fluorescence values of a reference sample, each one of said reference fluorescence values pertaining to a respective one of a second series of physical parameter values;
• a cumulative index calculator, in communicated with said difference calculator, configured to calculate a cumulative index, by selecting a first difference among said calculated pairwise differences, and selecting and adding to said first difference a plurality of ones of said pairwise differences, each one of the added differences being selected according to a proximity standard applied on each two differences selected in a sequence, the proximity standard being based on proximity of physical parameter values and on difference size;
• and
• a similarity determiner, in communicated with said cumulative index calculator, configured to determine similarity between said test sample and said reference sample, using said calculated cumulative index.