The bid is the highest price of all open buy orders. If you're selling, this is the maximum price you can make a sell order for and have your order instantly fi

The bid is the highest price of all open buy orders. If you're selling, this is the maximum price you can make a sell order for and have your order instantly filled. The ask is the lowest price of all open sell orders. If you're buying, this is the minimum price you can make a buy order for and have your order instantly filled.