A method of displaying a symbol representative of changes in price during a time period, the method includes receiving, for each intra-time period of a plurality of intra-time periods in the time period, intra-time price data including an intra-time open price, an intra-time close price, and an intra-time volume corresponding to the intra-time period, determining, from the received intra-time price data, an open price, which is an intra-time open price of an initial intra-time period and a close price, which is an intra-time close price of a last intra-time period, determining, from the intra-time volume of each of the plurality of intra-time periods, a highest intra-time volume occurring within a first intra-time period and a lowest intra-time volume occurring within a second intra-time period, generating a volume normalization value for the intra-time volume of each of the plurality of intra-time periods using the lowest intra-time volume and the highest intra-time volume, generating, by a charting engine, a candle body from the open price and the close price, wherein a height of the candle body indicates a difference between the open price and the close price, and a width of the candle body indicates a difference between a start time of the time period and an end time of the time period, generating, by a charting engine, in accordance with a selected intra-time volume rendering method, a body fill area from each of the generated volume normalization values of each of the plurality of intra-time periods, and displaying, by the charting engine, the symbol, which includes the candle body and the body fill area within the candle body.