New feature request: add water lines to visualization

[node]

Describe the feature:
When I visit my bashboard to see several visualizations, at very first I want to know "is everything ok now ? " . Usually we use yellow water line and red water line to warn.

Optional way:
So maybe we can add this feature to Kibana when create visualization ?! Just add one more field to customize yellow/red water line's coordinate like [(x1,y1),(x2,y2)] , commonly x1=0 and y1=y2, and style , commonly color=yellow/red .

@rashidkpc

UPDATE: Here water line means watermark or threadhold of y axis value .

[rashidkpc]

I'm not sure what a water line is, but I'm guessing this is already possible in timelion

.es(q="some search"), .static(100).color(yellow), .static(200).color(red)

[tbragin]

For core Kibana visualizations seems like a dup of: #5037

As @rashidkpc points out, this is possible with Timelion

[node]

Yeah, that's it. Thx.