Paper first, screens second

Screens hide volume in a compressed pane. Paper forces you to draw the histogram tall enough to argue about. That is why the first hour of most RiverHub lessons happens with pencils.

Students mark session highs, note which bars carried the move, and circle conflicts where price rose while volume fell. Only after that do we open the same session on a screen to check whether platform scaling changed the story.

If you practice alone, print one session per week. The friction is the point: confirmation techniques stick better when your hand has already committed to a mark.