Open outcry ran on two surfaces and nothing else: a hardened-paper trading card filled in with pencil, and the jacket on the trader's back. Price, quantity, month and the opposite broker's badge went into ruled boxes in graphite, erasable because the market moved faster than the hand. Everything between the boxes was gesture — palms in to buy, palms out to sell, fingers vertical to five and sideways to ten.

The visual system takes that literally. The field is pale: card stock and white cotton twill, never grey screen. The figure is jacket colour, solid and saturated, cut into flat blocks with hard edges. Red marks the sold side, blue the buy side, because that is how the card was printed. Type is condensed grotesque shouting across a pit and typewriter mono filling in a field.