Okay Lets Go what's an NBBO?

National Best Bid and Offer tells you the highs and the lows

The price, the highest bid and also the lowest ask

To trade at these numbers is the brokerages task

Its meant to ensure fairness by monitoring exchanges

And gatherin all the prices and the best are whats displayin

So the brokers gotta give ya best execution when dealin

That means lowest price for buy and high for sale or else they’re stealing