Access & accounts
What visitors and registered users can do.
0DTESPX.com has exactly two access levels: visitors and registered users. Registering is free and unlocks every available feature — there is no paid tier, no trial clock, and nothing to upgrade to later.
Today's in-progress session always streams at 1-second resolution for everyone until it closes, so you can evaluate the live experience before creating an account.
What each level can do
| Capability | Visitor | Registered (free) |
|---|---|---|
| Live SPX chart & overlays | Yes (1-second, live day) | Yes |
| Historical sessions | Most recent completed only | Every date, in full |
| Historical resolution | 30-second samples | 1-second |
| Place trades (practice & live) | — | Yes |
| Live accounts (continuous balance) | — | Yes |
| Strategy builder & results | View public strategies you're linked to | Build, save, update |
| Portfolios | View public portfolios you're linked to | Create and manage |
| Custom fee schedule & slippage | — | Yes |
| API + WebSocket | Public market data only | Everything |
Visitor
Without signing in you can watch the live chart, browse the most recent completed session, read a public strategy or portfolio someone shared with you, and read these docs. Historical market data is shown at a coarser 30-second resolution, and you can't place trades or save anything.
Registered (free account)
Sign up with your email — we send a 6-digit verification code to confirm it's you (no credit card, and a password is optional: you can keep logging in with fresh email codes instead). Registration is one account per inbox: address aliases that deliver to the same mailbox (for Gmail, dots and +suffix variants of the local part) count as the same inbox, and there's a small daily allowance of new sign-ups per network. One account is all you need — it unlocks the full platform:
- Every historical date at 1-second resolution, with the option chain reconstructable at any moment of any session.
- The account-less practice sandbox — replay any past trading day with $100,000 and full control of the clock.
- Live accounts with a continuous cash balance that carries day to day, for paper trading today's session in real time.
- Strategies and results — build a strategy and read its backtest over the full history, with one-click updates as new sessions become available, plus portfolios that aggregate several strategies.
- A custom fee schedule and slippage setting applied consistently to everything you see: order tickets, fills, settlement, and every backtest result you view.
Fair use
To keep the platform fast for everyone, heavy market-data reads are metered by a daily usage allowance that refills continuously — see Rate limits. Normal interactive use — trading, charting, clicking through strategy results — stays comfortably inside it.
The allowance is a load bound, not a data license: bulk extraction of the historical dataset is not permitted at any pace, and staying under the limit doesn't change that. Accounts that systematically copy the archive out — however slowly, and however many accounts the work is split across — may be suspended without notice. The full policy is in Acceptable use.
One account, everywhere
The same login works in the web app and against the API: the token returned by POST /auth/sessions is the same kind of session the browser holds. Anything you do over the API — sessions you open, orders you place, strategies you save — shows up in the app instantly, and vice versa.