In GS-Calc you can easily create charts with millions of data points, no matter whether the data sources are ranges or formulas. For example, a line (non-XY) chart with hundreds of thousands data points shown below is created/updated/refreshed instantly. The series consists of uniformly distributed 0-1 numbers plus one peak value. All peaks are displayed exactly as they are. In this case I streched the chart and it occupies several screen widths. The visible 2 vertical and 2 horizontal lines are just added sample user-defined grid lines.>/p>