When using Machine Speed tab on Machine Properties, Make Trend of "Calculated Speed from Spectrum" available

The Speed from Spectrum is very useful in IMx1/8/16.  I would like to be able to show a trend of the Calculated Speed from Spectrum alongside the vibration dynamic data.  

I would like a new legend item called "Calculated speed" that would only show data points where the Calculated Data has been able to extract a speed similar to the current legen item Spectrum.