Hello @Blanka,
Welcome to BCNAs  online community were you can connect with our very supportive community members.  It can be a tough time making decisions regarding treatment. See link below with further information regarding Oncotype DX test. 
https://www.bcna.org.au/understanding-breast-cancer/treatment/surgery/breast-cancer-pathology/Dont hesitate to call the BCNA helpline on 1800 500 258 if you would like to speak with a cancer nurse for information and or support. Wishing you all the best