Price Ticker

A live price with its change over a window.

The flash on update is a colour transition and nothing else — no scale, no slide — which keeps it inside the kit's motion rule and, more practically, stops a ticker updating every second from making the whole page twitch.

The flash compares against the *previous rendered* price, held in a ref. Deriving it from the change percentage instead would flash green on every tick of a day that is up, which tells you nothing about the tick.

Prices are given as numbers here rather than base units: a quote is a market rate, not a balance, so it never needs bigint exactness — but it does need enough fraction digits, hence precision defaulting by magnitude.