Before thinkscript was available on the TOS platform, you can only see the Advance/Decline line seperately and try to guess what the net number is. Now, you can just do a very simple script to get the net A/D line to show up on the graph.
For the NYSE AD line, pull up a graph of $ADVN. Edit the studies and create a new study. In the text area, put this in:
Plot AdvDecLine = Close - Close("$DECN");
For the Nasdaq AD line, pull up a graph of $ADVN/Q. Edit the studies and create a new study. In the text area, put this in:
Plot AdvDecLine = Close - Close("$DECN/Q");
