Exists condition in key metric
It it possible to add an exsists in custom metric?
Let's say I have col "A", "B", and "C".
https://us.v-cdn.net/6037859/uploads/4FDFWACTCCI2/image.png
In col "C" I want to count +1 when "A" >= 50 or when "B" = Y AND THERE IS NO OTHER VALUE IN "A" GREATER THAN 50.
Is it possible?