Every value list has at least two columns that matter, and most people only read one. They read value, treat it as the price, and skip the demand column as if it's a footnote. It isn't a footnote. It's the difference between an item that trades and an item that sits.
Same value, different trade
Take two items both listed at 14,000. On paper they're identical. In practice one has high demand — people are actively chasing it, so it moves in an afternoon at or above list — and the other has low demand, so it's technically worth 14,000 but you'll spend a week slowly accepting offers under list to get rid of it.
The value told you the midpoint. Demand told you how fast and how close to that midpoint you'd actually close. Swap the liquid item for the illiquid one at "equal value" and you've taken a real loss for a paper-even trade. You can see both numbers side by side on any value list; reading them together is the whole skill.
Why demand moves the real rate
Value is a slow, published average. Demand is the live pressure on top of it. When more people want an item than are willing to part with it, the effective rate drifts above list — people pay a premium to get it now. When nobody's chasing it, the effective rate drifts below, because the only way to move it is to discount.
This is why our trade calculator doesn't just compare totals. It weighs demand into the verdict, nudging high-demand items above their sticker value and low-demand items below it, so the call reflects how the trade actually closes rather than how it looks on paper.
When demand matters most
Demand swings hardest around updates and events. A new release can spike demand for related items overnight while the published value is still catching up, and an event mutation or limited can command a premium during the hype that evaporates a week later. In those windows, demand is doing almost all the work and the value number is the part that's stale.
The practical move is to read live: during the chaos right after an update, trust what's actually trading over a value that hasn't refreshed. The list will catch up; your trade window won't wait.
The one-line version
Value is the midpoint. Demand is everything else. If you only read the value number, you're reading half the page, and the half you skipped is the half that decides whether you're holding an asset or a paperweight. Read both columns, weigh demand into every trade, and the "why did my fair trade feel like a loss" question stops happening — because you'll have stopped making those trades.