S&P 500 ETF declines

What worked

• The post text frames the chart as a simple visual rule: red dots mark days when the S&P 500 fell 1%+ on positive breadth, which makes the chart easy to read at a glance.
• The chart shows two distinct periods, giving viewers a clear pattern to notice and discuss rather than a wall of noise.
• The design was polished and the topic was hot that week, which together drove 42 reposts and 133 saves despite a below average quote rate.

What to borrow

We could take a simple binary rule from our own data, mark the qualifying days as dots on a long timeline, and label the two or three periods the pattern reveals so readers can see the story without reading a caption.

Careful

Do not over-read the engagement: quotes were below average and the account has above average source reach, so some of the spread came from audience and timing rather than the chart alone, and the post shows no source line.