Storylines are multi-phase narratives that run across a game: an accounting scandal, a product cycle, a supply-chain rupture, a regulatory crackdown. Each has phases that advance over time, a financial impact on the companies involved, and spillover into related sectors, so a story that starts at one company can end up repricing three others.
Every active storyline shows its direction, derived from the current phase's own price impact. A storyline you hold exposure to is a position that is about to move, and which way is the only reason to open the page.