FFT Trend
Please provide a FFT (Fast Fourier Transform) frequency analysis trend. Best case scenario would be to right click (or otherwise select) a trend trace and convert back and forth between FFT and linear trends. It is indispensable for troubleshooting and determining frequency relationships and anomalies.
4 comments

Steve Edwards commented
we are using FFT currently in analyzing PID controller strain. FFT has broad application. We have built a custom symbol in PI vision for FFT analysis. Works well as an ad hoc data science tool and links nicely to event frames in pi vision.

Jerry Cole commented
This would be a valuable feature  provides a way to identify process industry oscillations and variability due to the following:
 process upsets
 equipment problems
 control system oscillations due to tuning and valve issues 
IJourneaux commented
THis would be useful in so many ways

Steve Edwards commented
This is needed in a range of cases. One broad example is machine vibration data from accelerometers for condition based maintenance.