The numbers represent who is winning in the current position, negative values indicate an advantage to black, positive values an advantage for white.
The dollar signs convey the same message:
http://en.wikipedia.org/wiki/Numeric_Annotation_Glyphs#Standard_NAGs
hi can someone explain to me meaning of numbers before lines ( - 1.46 or - 4. 64 or 19 dollars or 17 $) ???? please