edit i dont want to see how much the voltage is i want to see when it read analog
I'm taking a stab at this. I believe when you say "true" you are wanting to say "through", meaning "complete" or "done", is this correct?
And if that is the case, then it can be done but your circuit will have to be made to monitor your analog signal and have an LED at the same pin.
It would be simpler to use one pin for the analog signal input then turn ON an LED on another pin (setup as an output) when the A/D is completed or "through".