Privacy Policy¶
Last updated: April 2026
Overview¶
SPY Imbalance ("the site") is a personal project that provides a real-time visualisation of SPY order-flow imbalance data. This page explains what data, if any, is collected when you use the site.
Data we collect¶
Analytics¶
This site uses Google Analytics 4 to collect anonymous usage statistics, including:
- Pages visited and time spent
- Browser type and operating system
- Approximate geographic location (country/region level — not precise)
- Referral source
This data is aggregated and used solely to understand how the site is used. It is never sold or shared with third parties for commercial purposes.
Google Analytics uses cookies to distinguish visitors. You can opt out using the Google Analytics Opt-out Browser Add-on.
No account or personal data¶
The site requires no registration, login, or submission of personal information. We do not collect your name, email address, IP address (beyond what Google Analytics anonymises), or any other personally identifiable information.
Cookies¶
| Cookie | Purpose | Expires |
|---|---|---|
_ga, _ga_* |
Google Analytics visitor tracking | 2 years |
You can disable cookies in your browser settings at any time. The site will still function correctly without cookies.
Third-party services¶
| Service | Purpose | Privacy policy |
|---|---|---|
| Google Analytics | Anonymous usage analytics | policies.google.com |
| Interactive Brokers | Market data source (server-side only) | ibkr.com/privacy |
Data retention¶
We do not store any visitor data on our servers. All analytics data is retained by Google per their standard retention policies (14 months by default in GA4).
Your rights¶
If you are in the EU/EEA, you have rights under the GDPR including the right to access, correct, and delete data held about you. Because we do not collect personally identifiable information directly, there is nothing to access or delete on our end. For data held by Google Analytics, use Google's tools to manage your data.
Contact¶
For any questions about this privacy policy, open an issue on GitHub.