How to show value as continuing value in a Chronograph plot

I’m fairly new to this and I hope this is a simple question to answer.

I have InfluxDB taking in some data from a Python application which only updates the value occasionally.

When looking at Chronograph, the plot just goes down to 0 / stops if it doesn’t have any recent data (top image)

What I want it to do it just assume the latest value is the current value until I sent another one to it (bottom image).

Is there a way to make it do this?

Any help would be appreciated, thanks.

use -> fill(previous)
https://docs.influxdata.com/influxdb/v1.7/query_language/spec/#select

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