A price chart should not need to profile you

Price chart use

Chart filters and the data snapshot run locally in your browser after files are delivered from this site. Your browser does not contact retail data sources or collection services when you view or filter the chart.

Aggregate analytics

We may count page views and a small allowlist of actions such as changing a chart series, opening methodology, toggling historical context, or exporting data. Events include only the event name, a normalized page path, and a coarse source category.

Analytics does not include chart values, product IDs, form values, messages, email addresses, raw IP addresses, cookies, advertising IDs, fingerprints, or persistent visitor identifiers. Operational rate limiting may use a short-lived one-way connection hash; it is not stored with analytics.

Contact form

If you contact us, we use your reply email, chosen category, and message only to deliver and respond to that message. The site does not persist those fields in its database. The mail system necessarily processes them for delivery. Do not send passwords, account credentials, government identifiers, financial account data, medical information, or other sensitive material.

Cloudflare Turnstile processes technical information to distinguish legitimate submissions from abuse. Verification fails closed if Turnstile is unavailable.

Server logs and security

The hosting and network layers may create short-lived security/access logs needed to operate the service. Application code is designed not to put contact contents, reply addresses, raw provider responses, or visitor identifiers into analytics or application logs.

Third-party source links

Following a link to an external source takes you to that provider, whose privacy terms apply. The chart itself embeds no third-party product images, ads, tracking pixels, or remote fonts.

Retention and changes

Price observations are non-personal market data and are retained to preserve the historical series. Contact content is not retained by the website database. Aggregate counters may be compacted into monthly totals. Material privacy changes will update the effective date on this page.

Questions

Use the protected contact form and choose “Privacy question.”