Summary
Best Offer is the lowest displayed price currently available from sellers in the Orderbook. It may also be referred to as the best ask.
It represents the most competitive visible selling interest at that moment.
Why it matters
The Best Offer helps investors understand the price at which an immediate purchase may begin to execute, subject to the quantity available and current market conditions.
Together with the Best Bid, it is used to measure the Bid-Offer Spread and assess immediate liquidity.
How to read it
The Best Offer is normally shown with a price and an associated quantity. The price is the lowest visible amount a seller is currently willing to accept, while the quantity indicates how much is displayed at that level.
If a buy order is larger than the quantity available at the Best Offer, the remaining amount may execute against higher offer levels, depending on the order type and market conditions.
Things to keep in mind
The Best Offer is not a guaranteed execution price. Orders can be changed, cancelled, or matched before another order reaches the market, and the displayed data may update rapidly.
It also does not show all possible selling interest, as some orders may be hidden or available on another trading venue.