I have a custom field that i want to use to sort the data in line chart for Y-axis. Currently the options for Y-axis is either count or any other Metric aggregation. My field consists of integers only, which i want to implement for my Y-axis
I don't understand your question exactly- if you want to sort by something that isn't built-in to the editor in Kibana, it might not be supported. There are workarounds such as by using Vega, but we also welcome contributions to improve Kibana's functionality from the community.