# Timelion null
**URL:** https://discuss.elastic.co/t/timelion-null/92182
**Category:** Kibana
**Tags:** timelion
**Created:** [July 7, 2017, 12:10am UTC](https://discuss.elastic.co/t/timelion-null/92182 "2017-07-07T00:10:01Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@beckyb8](https://discuss.elastic.co/u/beckyb8)
#### Post date: [July 7, 2017, 12:10am UTC](https://discuss.elastic.co/t/timelion-null/92182/1 "2017-07-07T00:10:01Z")
When I plug this in to Timelion, I get a nifty graph:
```auto
.es(index=vision-*, 'avg:cacheFetch.99thPercentile').derivative()
```
However, when I add `kibana=true`:
```auto
.es(index=vision-*, kibana=true, 'avg:cacheFetch.99thPercentile').derivative()
```
I get a nasty error:
```auto
Error
Timelion: Error: in cell #1: [parsing_exception] Unexpected token VALUE_NULL [size] in [avg]., with { line=1 col=312 }
```
Is this expected behavior?
---
### Author:  [@thomasneirynck](https://discuss.elastic.co/u/thomasneirynck)
#### Post date: [July 7, 2017, 5:39pm UTC](https://discuss.elastic.co/t/timelion-null/92182/2 "2017-07-07T17:39:30Z")
hi @beckyb8,
can you add the metric identifier before the metric-parameter?
ie.:
```auto
.es(index=vision-*, kibana=true, metric='avg:cacheFetch.99thPercentile').derivative()
```
---
### Author:  [@beckyb8](https://discuss.elastic.co/u/beckyb8)
#### Post date: [July 7, 2017, 6:36pm UTC](https://discuss.elastic.co/t/timelion-null/92182/3 "2017-07-07T18:36:46Z")
@thomasneirynck Thanks, for suggesting an ordering issue. I used the following, and it worked flawlessly.
```auto
.es(index=vision-*, 'avg:cacheFetch.99thPercentile', kibana=true).derivative()
```
As a follow-up, is there an order-based protocol I should be aware of?
---
### Author:  [@thomasneirynck](https://discuss.elastic.co/u/thomasneirynck)
#### Post date: [July 7, 2017, 7:00pm UTC](https://discuss.elastic.co/t/timelion-null/92182/4 "2017-07-07T19:00:38Z")
hi @beckyb8,
There are some conveniences in the API for common use-cases (e.g. metric), but they aren't documented. So I wouldn't rely on it, and use named parameters instead.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 4, 2017, 7:00pm UTC](https://discuss.elastic.co/t/timelion-null/92182/5 "2017-08-04T19:00:38Z")
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