Trading research that survives contact with execution

Markets in Production

A small ecosystem for inspecting how order intent becomes fills: replay, latency, queue position, passive orders, and the engineering choices behind market systems.

Explore ordersim Read Trading Reality

A latency demo showing the same market replay producing different fill paths under different entry latency assumptions. — Same replay. Same strategy. Different latency.

Positioning

Publication, hub, artifact.

Trading Reality

The publication voice: essays about markets, execution, research, and the reality gap between clean models and traded systems.

Markets in Production

The ecosystem hub: durable landing pages for demos, concepts, tools, and the public map of work.

ordersim

The executable artifact: an inspectable order-book replay and execution simulator for Python research workflows.

Publication on Substack

Trading Reality is the essay surface.

The Substack remains the primary publication for execution, market structure, and how trading systems behave in the real world. This site gives those essays stable project pages, demos, and tool links.

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Landing pages

Make each idea linkable.

ordersim

Inspectable execution simulation, market replay, and fill-path audit logs.

Market microstructure

Queue position, passive fills, hidden liquidity, matching behavior, and data assumptions.

Execution systems

Gateway APIs, deterministic replay, engine equivalence, and production-facing design.

Latency and execution

How entry latency changes the route from order intent to actual fill.

Useful next step

Use the site as the stable map.

Keep Trading Reality on Substack for publishing. Put durable concepts, demos, GitHub links, PyPI links, and project pages here, where paths like /ordersim are fully under your control.