We develop an ExcelR Add-In that automates the evaluation and visualization of measures of risk and error (MORE) for performance measures that change over time. We use an example with a non-stationary arrival process to demonstrate the applicability and importance of a such tool. The tool takes raw simulation output, automatically calculates the pertinent MORE values, and generates side-by-side MORE plots for different time ticks according to a user-specified interval to characterize how the mean and percentiles of a time-dependent statistic and their corresponding confidence intervals change over time. The ADD-MORE tool significantly reduces the burden on the simulation analyst and can potentially have a high impact on simulation practice as there is no easy way to perform such analysis using existing tools. The tool is made available online for free and can potentially be integrated into existing simulation and/or statistical software packages to support output analysis and decision-making.