Timeplot is a DHTML-based AJAXy widget for plotting time series and overlay time-based events over them (with the same data formats that Timeline supports). Here is a live example: New Legal Permanent Residents in the U.S. (per year) vs. U.S. Population vs. U.S. History More Live Examples Energy Prices in the U.S. since 1975: this timeplot shows how the cost of gasoline in the US is strongly corre