Abstract: A novel technique for annotating a time series graph with embedded tick marks and grid lines and method for selecting and placing such tick marks and lines within such graph. This method allows for the creation of large time series graphs that allow simultaneous perception of graph trends and features as well as the visual estimation of the values of graph point(s). Graphs produced by this method do not require the excessive user effort, time, or manipulation of graphical user interface affordances that are entailed in these two perceptual tasks with graphs annotated using prior art methods. Additionally, this method allows for minimal visual clutter of the graph.