Normalize a script_score based on returned doc fields

Elastic Stack Elasticsearch
1

I am trying to change the _score of documents by normalizing all returned doc['relevancy'].value fields by the max doc['relevancy'].value of the result set. I also would like to multiple this result by the Max Elastic Search score found in hits.total.value.

Is this type of calculation possible? I can't seem to find something like it in the documentation.

curl -X GET "localhost:9200/products/_search?pretty&size=20" -H 'Content-Type: application/json' -d'
{
  "query": {
    "function_score": {
      "query": {
        "multi_match" : {
          "query":    "KQ2", 
          "fields": [ "item_id", "item_desc" ] 
        }
      },
      "script_score" : {
          "script": "(doc[\u0027relevancy\u0027].value / max_of_relevancy_field) * _max_score"
      },
      "boost_mode": "replace"
    }
  }
}
'
2

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