Ratio of different event count

[Dror_Tirosh]

I have a log of various event
I need to find the ratio of "good events" from "bad events". I want to graph it over time.

For the "vertical axis formula", I need something like
count(eventName=="bad) / count(eventName=='good')

How can I do it ? while I can create a global Filter by eventName, I can't find a way to create it inside the axis formula.

[Tomo_M (Tomohiro Mitani)]

You may find explanation in "Common formulas". kql can be used in Formula.

count(kql='eventName: true ')/count(kql='eventName: false ')

[Dror_Tirosh]

thanks, that worked great.