Yes, I use an indicator with a nymph. There are a few different ways to do this, but the most common is to tie the nymph onto the leader using a loop knot, and then attach the indicator about 18 inches above the nymph. The other way is to use a two-fly rig, with the indicator attached to the tippet above the first fly (the nymph). Whichever method you use, make sure that your knots are secure and that your tippet is of sufficient strength (4X or 5X) to handle any fish you might hook.