What does the delta label in comparison mode mean, and how is it different from arbitrage?

Q: What does the delta label in comparison mode mean, and how is it different from arbitrage?

The “Comparison delta” label shows how far this chart's price is from the leader's price (the one with the lock), and it appears only on charts where the broom is on. Arbitrage is a different column: the prices of other venues come from the Moonbot arbitrage feed, while the deviation in comparison is calculated by the terminal itself from two open charts.

Main screen

The window MoonTerminal opens on: order sizes and take-profit in the toolbar, chart tabs in the centre, orders and reports below.