Support Board

So - on the top of the chart I can see B= and A= which, I assume, are the current bid and ask prices.
When I say mid price, I mean the current price shown on the Y axis is the mid way price between bid and ask - correct?
What our client is asking is can his study refer to bid prices on a sell trade and ask prices on a buy trade, for example, and are those prices as easy to use in the study as the current price shown?

Thanks,