Privacy policies

Please note that the original version of the privacy policies is the French version. We make our best to provide a complete and accurate translation, but the French version will be our reference.

Short version

  • We collect anonymous data for statistic purpose, like how many pages are seen, how many visitors do we have each month
  • We do not share your personal data with anyone.
  • If you sign in, we'll take care of the protection of your personal data.
  • We use 3rd parties tools from Google to measure our visitors (Google analytics) and display advertising (Google Adsense) How Google uses data

General Data Protection Regulation - GDPR

The General Data Protection Regulation (GDPR) is a regulation on data protection and privacy for all individuals. To comply with this regulation we adopted (or are able to adopt):

  • We only collect necessary data. The purpose of the data processing is detailled on each form.
  • We do not share personal data with 3rd party. You won't receive spam from us.
  • Only you and Mataf's team have access to your personal data. Mataf's team will access the data only for technical or legal reason (as forum moderation)
  • To this day we process personal data for:
    • Emailing to our members who want regular notifications when a section of Mataf is updated (News, Analysis, Forum, new content...)
    • We collect and store data about your use of our services. We use these data to improve the most used services.
  • We do not delete your data unless you ask for.
  • Members have the option to delete their data from their profile page. This action is irreversible.
  • Members can download all their personal data from their profile page.
  • Personal data are encrypted, it can't be read without the key.
  • Our servers are regularly updated for security reason.
  • Our partners are GDPR compliant (see the list of our partners below)
  • Zero risk does not exist, if we detect a breach in our system we'll alert the CNIL (official French organisation for personal data protection) and our members.

The Data Privacy Officer (DPO) is Arnaud Jeulin

Cookie policy


To make this site work properly, we sometimes place small data files called cookies on your device. Most big websites do this too.

What are cookies?

A cookie is a small text file that a website saves on your computer or mobile device when you visit the site. It enables the website to remember your actions and preferences (such as login, language, font size and other display preferences) over a period of time, so you don’t have to keep re-entering them whenever you come back to the site or browse from one page to another.

How to control cookies

You can control and/or delete cookies as you wish – for details, see You can delete all cookies that are already on your computer and you can set most browsers to prevent them from being placed. If you do this, however, you may have to manually adjust some preferences every time you visit a site and some services and functionalities may not work.

Cookies list

Source Cookie Name Purpose Expiration Opt out MATAFSID Session identifier Session Essential Cookie mataf_cookie Store your cookie's consent 1 year Essential Cookie mataf_user Session identifier 5 years Essential Cookie locale Contains your language. Used by mataf to display some content in the right language. 5 years Essential Cookie flarum_session Forum session identifier Session Essential Cookie flarum_remember Unique ID used by the forum 5 years Essential Cookie mataf_volatility Store your preference for the volatility tool 5 years Essential Cookie mataf_correl_pairs Store your preference for the correlation tool 5 years Essential Cookie mataf_global Store your preference for the global tool 5 years Essential Cookie timeframe Store your favorite timeframe 5 years Essential Cookie instrument Store your favorite instrument 5 years Essential Cookie
Google Analytics _ga Used to distinguish users. 2 years opt out
Google Analytics _gid Used to distinguish users. 24 hours opt out
Google Analytics _gat Used to throttle request rate. If Google Analytics is deployed via Google Tag Manager, this cookie will be named _dc_gtm_ <property-id>. 1 minute opt out
Google Analytics AMP_TOKEN Contains a token that can be used to retrieve a Client ID from AMP Client ID service. Other possible values indicate opt-out, inflight request or an error retrieving a Client ID from AMP Client ID service. 30 seconds to 1 year opt out
Google Analytics _gac_{property-id} Contains campaign related information for the user. 90 days opt out
Google Adsense __gads Google Adsense cookie Various opt out
Cloudflare __cfduid The __cfduid cookie is used to identify individual clients behind a shared IP address and apply security settings on a per-client basis. For example, if the visitor is in a coffee shop where there are a bunch of infected machines, but the specific visitor's machine is trusted (e.g. because they've completed a challenge within your Challenge Passage period), the cookie allows us to identify that client and not challenge them again. It does not correspond to any user ID in your web application, and does not store any personally identifiable information. This cookie is strictly necessary for Cloudflare's security features and cannot be turned off. 1 year Essential Cookie

Our partners


We use some Google's services as Google Analytics (web analytics) and Adsense (Advertising)

This website uses Google Analytics, a web analytics service provided by Google, Inc. (“Google”). Google Analytics uses “cookies”, which are text files placed on your computer, to help the website analyze how users use the site. The information generated by the cookie about your use of the website (including your IP address) will be transmitted to and stored by Google on servers in the United States . Google will use this information for the purpose of evaluating your use of the website, compiling reports on website activity for website operators and providing other services relating to website activity and internet usage. Google may also transfer this information to third parties where required to do so by law, or where such third parties process the information on Google's behalf. Google will not associate your IP address with any other data held by Google. You may refuse the use of cookies by selecting the appropriate settings on your browser, however please note that if you do this you may not be able to use the full functionality of this website. By using this website, you consent to the processing of data about you by Google in the manner and for the purposes set out above.

More information


Our servers are hosted by OVH. OVH is GDPR compliant

140 quai Sartel 59000 ROUBAIX, France

Phone : 0899 701 761


We use Cloudflare as a CDN (Content Delivery Network). Cloudlfare is GDPR compliant