Just realized arcs help visualize the possible upcoming change in trends… from declining.. to basing… to inclining. That pretty much what Stage Analysis is…  The added value of this visualizing property is expectations management. Instead of day dreaming how silver is going to da moon now… you can see a potential road map in time… making you tone down those emotional ups and down.. that will eventually break you (and your nav) if not contained.

Edit: Adding angle of entry and exits for arcs… seems to be mirror image (something again I picked up from NorthStar).