The canopy is the architecture
A market stall solves the same problem a shop solves — display, weather, security — using three objects instead of a building.

A white canopy does the roof. A rack does the shelving. A rail of garments does the display, hung so that the front item is the one that sells and the rest is visible behind it.
Look at what is happening with colour: a red and black patterned shirt at the front, a purple dress with green leaf motifs beside it. Two strong colours set next to each other so that each makes the other look deliberate. That is a merchandising decision, made in the same square metre every trading day.
The stall is also a form of security: everything can be taken down, folded and carried by the person who owns it, which is what makes trading possible without owning property.
It is easy to walk past this and see clutter. It is harder, and more accurate, to see a building that folds.