Does NBBO should be same on different exchanges or they do differ per exchange?

[guru]

This is a neat set up....Bid-Mid-Ask-Volatility%. Thank you for sharing Robert.
What is Volatility representing in this option chain? Is it Implied Volatility or Historical Volatility? Or something else...
Thanks in advance.

In IB/TWS Option Chain window, you can right click on any column and insert a new column, selecting any of the Greeks.

 

[congrats]

Kool...thanx Guru.

 

[Robert Morse]

A calc of the current Ivol for that option only. That screenshot was from Lightspeed Trader but LVX shows Historical Volatility on charts and we offer that to IB clients with Lightspeed/Lime as your broker. https://www.lightspeed.com/trading-platforms/livevol-x/

This is a neat set up....Bid-Mid-Ask-Volatility%. Thank you for sharing Robert.
What is Volatility representing in this option chain? Is it Implied Volatility or Historical Volatility? Or something else...
Thanks in advance.