MarketDelta is the inventor of the Footprint chart. A Footprint® is an individual price painted on the chart with a unique color that contains volume or some other market statistic. Stacking Footprints together creates bars, similar to what any candlestick or bar chart would present. The primary difference, and thus advantage of the Footprint® chart, is it shows each individual price within a bar AND displays value added information such as volume at price, order flow, buy/sell pressure, and other valuable statistics so that you can react quicker and have much greater insight to what is happening.
No more waiting for the bar to close to have an idea what is happening. Footprints help you react quicker because of how they represent the price and volume data.