The OTX (Online Testing Exchange) International Film Tracking service is expanding to Russia and China, the first such tracking service in each country.

Clients of the consumer research and consulting company will be able to use the service to evaluate marketing campaigns up to five weeks before release.

OTX's weekly international tracking study surveys a national sample of moviegoers in each territory. In Russia, the new service will track wide-release film titles including both US and local productions. In China, OTX will track film and DVD releases.

OTX already covers the US, UK, Germany, France, Spain, Italy, Japan and Australia, with South Korea and Mexico forthcoming.