1. A system including: a computing device, wherein the computing device is adapted to display a price axis including a plurality of price levels, wherein the computing device is adapted to receive a definition for an annotation, wherein the definition for the annotation includes an annotation price level and annotation information, wherein the definition for the annotation is specified by a user, wherein the annotation price level includes at least one price level, wherein the computing device is adapted to process the definition for the annotation to determine that at least one of the price levels of the annotation price level is within the plurality of price levels of the price axis, and wherein the computing device is adapted to display the annotation information along the price axis at the at least one of the price levels of the annotation price level determined to be within the plurality of price levels of the price axis.