There are some indexes and market indicators that just make more sense when charted in the inverse. For example, when charting the Volatility Index ($VIX) high values are bearish and low values are bullish. In this case, it feels more intuitive to invert this chart, so bullish values are at the top and bearish at the bottom.
Currently, we don't have a way to simply invert a SharpChart. We do, however, have a way to calculate the reciprocal of any dataset and chart that. It's not exactly the same, but it is often “good enough.”
You can create a reciprocal chart by first entering the “$ONE” symbol, a colon character, and then your chosen symbol in the “Enter Ticker” box. For instance, “$ONE:$VIX” will create such a chart. Example
You can also add a minus sign to the front of any ticker symbol to chart the true inverse of that dataset. Example