Bitcoin (BTC) trading volume on Upbit dropped 25.69% in a day, falling to 704.9 billion won, according to figures published on October 18, 2026. Upbit ranks among South Korea's largest cryptocurrency exchanges, making its won-denominated BTC turnover a widely watched read on local trading activity — and a single-day decline of this size points to a marked pullback in Korean demand.

COINOTAG update, 04:56 UTC: The Coinbase premium, a gauge of US spot demand, printed -0.1376% on October 18, marking its fifth straight negative session. That follows a reading of -0.1417% on October 14 and levels near -0.14% on each day since. A negative print means BTC is changing hands at a discount on the US venue relative to other major exchanges, so a five-session run below zero indicates US spot demand has been running consistently softer than elsewhere, a backdrop that coincides with the sharp one-day pullback in Korean turnover. Taken together, the two datasets point to thinning activity on both fronts, and upcoming daily readings of Upbit's volume and the premium's sign are the figures to watch for any sign the pullback is extending or leveling off.

This content was first published on COINOTAG.