Legal
Terms of Service
Agreement
By creating an account or using OverfitCheck (“Service”), you agree to these Terms of Service. If you do not agree, do not use the Service. These terms constitute a binding agreement between you and the operator of OverfitCheck.
Not financial advice
OverfitCheck provides statistical analysis of backtest data only. Results do not constitute financial advice, investment recommendations, or a guarantee of future performance. Statistical robustness in historical testing does not predict live trading outcomes. All trading involves substantial risk of loss. The score and all test results are tools for your own informed decision-making. You are solely responsible for any trading decisions you make.
Nothing on OverfitCheck is a recommendation to trade any instrument. That covers scores, test results, analysis text, documentation, and blog posts. Past statistical performance of a backtest does not guarantee future results in live markets.
The performance in a backtest is hypothetical. Those trades were simulated against historical data. They were never actually executed, no money was at risk, and no order ever reached a market. A simulation cannot fully account for what real execution does to a result: whether there was enough liquidity to fill at the price the backtest assumed, the spread and slippage a live fill actually costs, or the discipline it takes to keep following a system while real money is on the line. Live results routinely differ from simulated ones, and often fall short.
Eligibility
You must be at least 18 years old and capable of entering into a binding contract to use OverfitCheck. By using the Service, you represent that these conditions are met.
Your account
You are responsible for maintaining the confidentiality of your account credentials. You are responsible for all activity that occurs under your account. Notify us immediately at support@overfitcheck.com if you suspect unauthorized access.
You may not share your account, use automated tools to create multiple accounts, or use the Service in a way that circumvents plan limits.
Plans and billing
Free plan. The Free plan provides 3 audits over the lifetime of your account at no charge. No credit card is required.
Second-opinion report. A second-opinion report costs $49 and is a single one-time purchase. It grants one full audit, including the PDF report, and it does not expire. It is consumed only when an audit completes successfully; a failed or rejected upload does not consume it. There is no subscription, nothing renews, and there is nothing to cancel.
Refunds. If a report did not do what the pricing page says it does, contact us within 7 days of the charge and we will refund it in full. If you believe a charge was made in error, contact us within 14 days and we will review it.
Prices may change at any time; a change never affects a purchase already made. All prices are in USD.
Acceptable use
You may not use OverfitCheck to:
- Upload files containing malicious code or exploits
- Attempt to reverse-engineer or extract the statistical methodology in a way that violates these terms
- Circumvent rate limits, plan restrictions, or access controls
- Resell or sublicense access to the Service
- Use the Service in a way that violates applicable law
Your data
You retain ownership of your backtest data. By uploading data, you grant us a limited license to process it for the purpose of providing the Service.
Your strategy data is never used to train AI models and is never sold to third parties.
We may share statistical results data (not raw trade data) with Anthropic’s Claude API solely to generate plain-English analysis text as part of the Service. See our Privacy Policy for full subprocessor details.
Intellectual property
The OverfitCheck platform, including the statistical methodology, code, design, and documentation, is owned by OverfitCheck and protected by intellectual property law. You may not copy, distribute, or create derivative works from any part of the platform without written permission.
The score, CSCV-based probability of backtest overfitting implementation, and associated methodology are proprietary to OverfitCheck.
Disclaimer of warranties
THE SERVICE IS PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND. WE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE SERVICE WILL BE UNINTERRUPTED, ERROR-FREE, OR THAT STATISTICAL RESULTS WILL BE FREE FROM ERRORS.
Limitation of liability
TO THE MAXIMUM EXTENT PERMITTED BY LAW, OVERFITCHECK SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING TRADING LOSSES, LOST PROFITS, OR DATA LOSS, ARISING FROM YOUR USE OF OR INABILITY TO USE THE SERVICE. OUR TOTAL LIABILITY SHALL NOT EXCEED THE AMOUNT YOU PAID US IN THE 12 MONTHS PRECEDING THE CLAIM, OR $100, WHICHEVER IS GREATER.
Account termination
You may delete your account at any time via account settings. We will delete your personal data and audit records within 30 days of receiving your request.
We may suspend or terminate accounts that violate these terms, with or without notice. Subscriptions are not refunded upon termination for cause.
Changes to these terms
We may update these terms. We will post the updated terms at this URL with a revised “Last updated” date. Continued use of the Service after changes are posted constitutes acceptance of the updated terms. For material changes, we will also notify you by email.
Governing law
These terms are governed by the laws of Washington State, United States, without regard to conflict of law principles. Any disputes shall be resolved in the state or federal courts located in Washington State.