This text currently says "An overview of the flow of the CDS-Hooks and SMART-on-FHIR exchange is shown below." 

There no additional information about CDS hooks on this page or anywhere close to it. That overview is in section 8 (CDS Hooks).

I suggest replacing "below" (in the above sentence) with "in Section 8" (with this URL: http://build.fhir.org/ig/HL7/davinci-epdx/CDS-Hooks.html).