Right now you are blindly updating the indicator with the joystick value. You need to update the indicator when there's a change in the joystick value. This means you need to keep track of the current value and compare it to the previous value. If there's a change, update the indicator. Otherwise, don't. Either a shift register or feedback node will work.
Side-note: do not use the Run Continous button. Your VI already has a loop.
Side-note 2: Do not place the Initialize VI inside the loop. Initialize outside, do work inside, and then close when loop is done. Please see the examples that ship with LabVIEW.
