Querying nested objects AND comparing nested objects in the same time

Elastic Stack Elasticsearch
1

Hi,
I have the following mapping:

"page": {
"properties": {
    "rawUrl": {
        "type": "string",
         "index": "not_analyzed"
    },
    "url": {
        "type": "string",
        "analyzer": "url_email"
     },
     "crawls": {
         "type": "nested",
         "properties": {
             "cwlDate": {
                 "type": "date",
                 "format": "yyyy-MM-dd",
                 "index": "not_analyzed"
             },
             "cwlHour": {
                 "type": "date",
                 "format": "HH:mm:ss",
                 "index": "not_analyzed"
             },
             "cwlValues": {
                 "type": "nested",
                  "properties": {
                      "cwlType": {
                          "type": "string",
                           "index": "not_analyzed"
                 },
                 "cwlCode": {
                      "type": "string",
                      "index": "not_analyzed"
                 },
                 "cwlSelector": {
                      "type": "string",
                      "index": "not_analyzed"
                  },
                  "cwlValue": {
                      "type": "string",
                      "index": "not_analyzed"
                  }
              }
          }
      }
}

I am looking for a way to request elastic to get, for exemple:
all documents, where crawls.cwlValues.cwlCode = 'price' and crawls.cwlValues.cwlValue > 20, but only if crawls.cwlValues.cwlValue.cwlDate is the most recent date:

say I have a document where crawls is like:

 [{cwlDate: '2016-04-15', cwlValues: [{cwlCode:'price', cwlValue: '19'}]},
  {cwlDate: '2016-04-14', cwlValues: [{cwlCode:'price', cwlValue: '21'}]}]

I don't want the document to match, because even if cwlValue > 20, it is when cwlDate is not the last one.

I think it is possible with a scripted query, but I was wondering if there was another way.

Thanks.