Forward chaining involves researching the sources that have cited a particular work to find more recent material covering similar topics.
A couple of databases that are really useful for forward chaining are Scopus and Web of Science. Both databases will show a list of references for a particular work if that item has been cited by other works in those particular databases.
Resources that cite your article...
- will be newer than the article you've already found
- will help you identify more recent, relevant research