1. A method of using a touch-sensitive computing device to apply at least one statistical function on at least one data point in a chart comprising: demarcating an area of the chart on a display of the touch-sensitive device in proportion to a detected touch-initiated dragging by a user on a touch-sensitive surface of the touch-sensitive device, wherein the demarcated area is of a shape and size which is a function of the touch-initiated dragging by the user; changing the demarcated area according to a detected touch-initiated dragging of at least one drag point, wherein a border surrounding the demarcated area includes the at least one drag point; identifying a plurality of statistical functions associated with a plurality of data points included in the demarcated area; identifying an adjustable parameter for each statistical function based on the function and the data points included in the demarcated area; presenting the user with an interface on the display including a menu to select from the plurality of identified statistical functions and a submenu to select from identified adjustable parameters; performing a user selected parameter adjustment of the user selected statistical function on the data points included in the demarcated area of the chart, wherein the performing of the parameter adjustment acts on at least one of the plurality of data points; and displaying a result of the performing on the interface on the display, wherein the interface is distinct from the chart including the demarcated area.