# Custom score using the max and the min of two fields
**URL:** https://discuss.elastic.co/t/custom-score-using-the-max-and-the-min-of-two-fields/10951
**Category:** Elasticsearch
**Created:** [February 28, 2013, 12:19pm UTC](https://discuss.elastic.co/t/custom-score-using-the-max-and-the-min-of-two-fields/10951 "2013-02-28T12:19:43Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Davide\_Non\_Vattelape](https://discuss.elastic.co/u/Davide_Non_Vattelape)
#### Post date: [February 28, 2013, 12:19pm UTC](https://discuss.elastic.co/t/custom-score-using-the-max-and-the-min-of-two-fields/10951/1 "2013-02-28T12:19:43Z")
hi all,
I need to redefine the score in my search result.
The formula I want to use is something like:
"script" : "0.5 \* ((doc['priceMin'].value - priceMin) / (priceMax -
priceMin)) + 0.5 \*(1 - ((doc['rank'].value - rankMin) / (rankMin -
rankMax)))",
"params" : {
"rankMin" : 1,
"priceMin" : 1,
"rankMax" : 5,
"priceMax" : 130
}
But I want replace the params with calculated value, where rankMin and
priceMin are the min values for related fields in my index, and rankMax and
priceMax are the max values for related fields in my index
Someone know how I can do it?
thanks,
Davide
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### Author:  [@Clinton\_Gormley](https://discuss.elastic.co/u/Clinton_Gormley)
#### Post date: [March 1, 2013, 12:41pm UTC](https://discuss.elastic.co/t/custom-score-using-the-max-and-the-min-of-two-fields/10951/2 "2013-03-01T12:41:37Z")
> But I want replace the params with calculated value, where rankMin and
> priceMin are the min values for related fields in my index, and
> rankMax and priceMax are the max values for related fields in my index
First you'll need to calculate those values using a statistics facet,
then you can pass them as parameters.
You can't do it all in one request
clint
> Someone know how I can do it?
>
> thanks,
> Davide
>
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 2:48am UTC](https://discuss.elastic.co/t/custom-score-using-the-max-and-the-min-of-two-fields/10951/3 "2017-07-06T02:48:50Z")