A method of updating a display of a symbol representative of changes in price during a time period, the method includes generating and displaying a first symbol comprising an intra-body fill area for each intra-time period of a first plurality of equal intra-time periods in the time period, receiving an input event, and in response to the received input event, generating and displaying a second symbol in place of the first symbol, the second symbol comprising an intra-body fill area for each intra-time period of a second plurality of equal intra-time periods in the time period wherein a number of the second plurality of equal intra-time periods is different from a number of the first plurality of equal intra-time periods.