Best Bid—The highest bid currently seeking to buy. The bid side can absorb about — FAIR in total (each bid's remaining budget converted at its order price). The spread row in the order book lets you sell at the best price in one click.
Best Ask—The lowest unit price currently for sale. Filling all FAIR on offer takes about — CBTC (sum of per-order fills, excluding fees). The spread row in the order book lets you buy at the best price in one click.
Spread—
Fee Rate—The fee rate is snapshotted into the order when it is placed; later rate changes do not affect existing orders. The fee is always paid by the taker on top of the trade amount, and the maker receives and pays in full.
