Fast Up Button on Reddit

What it signals here

upvote context

Used in comments to note a post or karma count rising extremely fast.

community use

Common in finance, fitness, and self-improvement subreddits.

subreddit meaning

In r/wallstreetbets and r/stocks it signals a bullish fast move; in r/progresspics it marks a fast transformation.

karma context

Ironically placed when a controversial post is somehow gaining upvotes rapidly.

See it elsewhere