Yesterday, I let my Slope PLUS subscribers know about a feature in SlopeCharts that I built exclusively for them. Specifically, the ability to publish and subscribe to the watch lists of other users (and the charts therein, including the drawn objects for each chart). You can learn all about it on this page.
Here are a few relevant screen shots below. if you’ve been on the fence about subscribing to PLUS, this might just be what convinces you, since it’s just about the coolest thing ever. Again, you can learn all the particulars on this page.