Does anyone know of a strategy or technique for displaying NAV (Net Asset Value) over time for individual funds? I'm very familiar with Google Sheets (Excel), but I'm open to other suggestions.
The best tool for advanced plotting of data is Mathematica, assuming that you have the time to learn how to use it. Mathematica has a basic tutorial on plotting financial data. You can hook Mathematica up to dynamic feeds of financial data.
The basic function for plotting time-series values, like NAV, in Mathematica is the DateListPlot function, but there are other specialized plots (listed previously above) specifically for financial time series.
Categorised by investment platform in this example.