Waiting for Onco Type results

I was diagnosed in July after having my first surgery to remove Atypical cells. My doctor explained that they were abnornmal cells that can turn cancerous in the future and she wanted to remove them.  They came back as Stage 1 Invasive Lobular Cancer.  Ive had MRIs and biopsys in new areas and also had my second surgery to remove more of the margin and had lymph nodes removed and tested, which came back negative , Thank God.  Now I am waiting for Onco Type results.  How does the scale work? what is considered high and what is considered low?  I am really worried about having to have Chemo.