Reading an order book

The order book lists resting bids (green) below the price and asks (red) above it. The gap between the best bid and best ask is the spread.

Large resting quantities can act as temporary support or resistance, but they can also be cancelled instantly. Treat them as hints, not guarantees.

The depth chart sums the book into a cumulative curve so you can see how much size sits within a given distance of the price.