what is the best bid 
the bid also known as the sell is the highest price that a bank or a brokerage is willing to buy an asset from a trader that is to say it is the most a trader can receive when he sells an asset or security along with the ask also known as the buy the bid is one half of a price quotation which is the indicative cost upon which the buyer and seller agree when trading forex and cfds the bid rate is always lower than the ask rate and the difference between the two is referred to as the spread each broker and bank has its own bid that is to say its own highest price that it is willing to pay for an asset and different banks may have different bids the highest bid offered by any bank or broker is known as the best bid 