OpenBacktest

Terms

Terms of Service

Last updated October 11, 2026

These terms govern your use of OpenBacktest, a service of Velotech LLC. By creating an account or using the site you agree to them. If you do not agree, do not use the service.

1. The service

OpenBacktest is a software tool for backtesting SPX options strategies against historical market data. It is provided at https://openbacktest.com by Velotech LLC ("we", "us"). We provide backtesting and nothing else: we do not execute trades, hold funds, manage accounts, or give investment advice.

2. Accounts

You must be at least 18 years old and able to form a binding contract. You are responsible for keeping your login credentials private and for everything that happens under your account. One account is for one person; sharing a login is not permitted.

3. Subscription and billing

The service is sold as a single monthly subscription at $29 USD per month, billed in advance on the day you subscribe and on the same day each month after that. Prices are shown before any applicable taxes. We may change the price with at least 30 days' notice by email; the new price applies from your next billing date after the notice period.

You can cancel at any time from your account settings. Cancellation stops future charges; access continues until the end of the period you have already paid for. Our Refund Policy describes when a refund is available.

Payments are processed by a third-party payment processor. We do not store full card numbers.

4. Acceptable use

You agree not to:

  • Scrape, bulk-download, resell, or redistribute the historical market data or backtest outputs as a dataset.
  • Reverse engineer, probe, or overload the service, or access it by any means other than the interface we provide.
  • Use automated scripts to run backtests at a rate that degrades the service for others. "Unlimited" means no quota on your own use, not a license to run a bot farm.
  • Use the service for anything unlawful.

We may suspend or close accounts that break these rules.

5. Data and results

Historical data comes from third-party sources and may contain gaps, errors, or revisions. Backtest results are hypothetical, depend on assumptions about fills, slippage, and fees, and do not represent actual trading. Read the Risk Disclosure; it is part of these terms.

6. No investment advice

Nothing on the site or in the service is a recommendation to buy, sell, or hold any security or derivative, or to adopt any strategy. We are not a broker, dealer, investment adviser, or commodity trading adviser. Decisions you make based on the service are yours alone.

7. Intellectual property

The service, its software, design, and content belong to Velotech LLC. You own the strategies you define and the exports you download for your own use. You grant us a limited license to process your strategy definitions in order to run them.

8. Availability and changes

We aim for high availability but do not promise uninterrupted service. We may change, add, or remove features. If we discontinue the service, we will give at least 30 days' notice by email and refund any prepaid period beyond the shutdown date.

9. Disclaimer of warranties

The service is provided "as is" and "as available", without warranties of any kind, express or implied, including merchantability, fitness for a particular purpose, accuracy, and non-infringement.

10. Limitation of liability

To the fullest extent permitted by law, Velotech LLC is not liable for any indirect, incidental, special, consequential, or punitive damages, or for any trading losses, lost profits, or lost data, arising from your use of the service. Our total liability for any claim is limited to the amount you paid us in the 12 months before the claim arose.

11. Termination

You may close your account at any time. We may suspend or terminate your access for breach of these terms, with notice where practical. Sections 5 through 10 survive termination.

12. Governing law and disputes

These terms are governed by the laws of the United States and the state in which Velotech LLC is organized, without regard to conflict-of-law rules. You agree to the exclusive jurisdiction of the courts located there. Before filing any claim, contact us at [email protected] and allow 30 days for us to try to resolve it.

13. Changes to these terms

We may update these terms. Material changes will be announced by email at least 14 days before they take effect. Continued use after that date is acceptance of the new terms.

Contact

Questions about this document: [email protected].