Hedging Currencies with Forwards (Matched and Mismatched swaps)

I understand when to use the bid and when do use the ask on a spot and with forward points, but I ran across an example in the CFA curriculum where they use the “mid-market rate” or the midpoint between the bid and ask and then add the forward points to calculate the all in forward rate. Can anyone explain when we are supposed to use the “mid-market rate” and when to use the bid/ask quotes?

Your help is much appreciated!

Mid market rate is used when we have to take the average of bid ask rates or when the bid ask rates are not available. Bid ask quotes are used to calculate cross rates or when both the quotes are available in the real time environment.

Also use mid quotes in swaps, even when given bid-ask.