Numbers, Arrowheads, and % Signs on a Chart

Hi Pat, I see the referenced items annotated on a charts and would like to get clarification on them. For example, on the cup and handle training video, I see 10% and 20%s and numbers 1 and 2 at 8:30 plus arrow head at 9:30 minutes of the video. Is there a legend we can refer to so that we do not misinterpret the notations? Thanks.