01
Simulate
Virtual balance, long positions, average cost, and realized and unrealized P&L.
Recreational finance product · Functional MVP
Learn the market by playing seriously.Without real money.
Aetheos turns trading practice into a competitive experience: quotes, positions, limit orders, and tournaments live in one interface built for fast decisions.
See how it is built
In development · 2026
- Product
- Trading simulator
- Base
- Next.js + TypeScript
- Data
- Supabase + Postgres
- Approach
- Mobile-first
01 · The product
A place to practice decisions, not play with money.
Aetheos creates a controlled environment to browse stocks, trade with virtual balance, and see how a portfolio changes without taking financial risk.
The experience brings market data, simulation, and competition together. Users can inspect an asset, buy or sell, schedule a limit order, and compare performance inside a league.
02
Understand
Market, candles, and quotes with real-time updates or a polling fallback.
03
Compete
Public or private tournaments with rankings, invites, and participant activity.
02 · Architecture
The interface stays fast because sensitive logic stays on the server.
Server Components load the first view, Client Components handle interaction, and Server Actions run mutations against the user’s actual session.
Client
React, Tailwind CSS, and Lucide React for a responsive UI with clear states.
Domain
Separate calculations for positions, performance, candles, and market status.
Server
Supabase Auth, RLS, Postgres, and transactions prevent partial state.
Providers
Yahoo Finance and Finnhub with cache, timeouts, and controlled fallback.
03 · Product in use
A command center for reading the market and acting.
The home view condenses equity, performance, buying power, top movers, and ranking. Detail stays one click away, but the main decision is visible on the first screen.
04 · Mobile-first design
Trading should not depend on a large screen.
The sidebar becomes a drawer and panels reflow without hiding the main data: asset, value, and result.
Mobile views preserve the market and portfolio hierarchy instead of shrinking the desktop layout into a thumbnail.
01 / market 
02 / portfolio 
03 / asset 05 · Rules and trust
The simulation feels light. The controls are not.
Aetheos validates symbols, quantities, session, and market state before recording a trade. Turnstile protects access and RLS isolates private data by user.
Transactional mutations
Wallet, position, and trade commit together or not at all.
Separate limit orders
A pending order never appears as an already-executed purchase.
Auditable consent
Age confirmation and legal documents are stored with versions and traceability.
Auth + legal
Aetheos login screen
Aetheos validates symbols, quantities, session, and market state before recording a trade. Turnstile protects access and RLS isolates private data by user.
Expand 06 · Tournaments
Rankings turn data into a reason to come back.
Public or private leagues have virtual capital, dates, invites, rankings, and activity detail. The system keeps participant context so performance remains meaningful.
What comes next
A functional MVP with room to grow.
The base is ready for observability, integration tests, and a more precise market update strategy. The current scope keeps Aetheos clearly positioned as a recreational simulation, not a financial service.