The magic with “Ça va” is that it has so many different meaning depending on the tone you are using
As a question it can mean :
How is it going?
Are you okay?
Are you hurt?
What are you up to?
But it can also be use as an answer to those same questions :
I’m doing great
I’m fine
I’m alright
It’s going okay
And it can also be used in other way like
You can stop now
That’s all
Oh Come on!
It’s not that bad