Bitcoin · 2026-10-21

That day's trend: Cautiously bullish

That day's view: Today’s view: BTC closed at 84,093 on 10/21, up 1.28%, with an open of 83,028, a high of 84,898, and a low of 82,635. It probed the day’s low in the morning before moving higher in a volatile advance, surged to 84,898 intraday, then pared back some gains to close at 84,093. Trading volume reached 16,544, up 16.4% from the 7-day average of 14,216. Volume expanded during both the rally and the pullback, casting doubt on the durability of buying. Funding: Rates were positive across all four periods, rising to 0.00854% in the middle of the session before collapsing to 0.00051% in the final period, a decline of more than 90% from the peak, while the central funding rate fell 30% from the prior day. Positioning: Open interest surged 3.36%, the largest increase in nearly seven days, diverging from the two-tier reduction in large-player positions, with most of the increase coming from new short entries. Structure: The large-account long/short ratio fell 30.3%, the position long/short ratio fell 10.5%, and the retail long/short ratio fell 31.6%. The Fear and Greed Index rose from 55 to 63, returning to the greed zone; longs retreated across all cohorts while retail sentiment improved. The signal is classified as (c) short-covering: passive short covering pushed prices higher early on, new short entries took over later, and active selling dominated in the final period (active buy/sell ratio of 0.67). The quality of the rebound was weak, warranting caution. Outlook: The 10/23 Deribit options expiry is the largest near-term variable. Resistance lies at 84,898–85,000, while support is at 83,000 and 82,635. The sustainability of volume will determine the strength of the rebound.

Key Data

BTC closing price: $83,028.14 at UTC 2026-10-21 00:00; $84,221.47 at UTC 2026-10-21 24:00; +1.28% within the window
Intraday range: high $84,898.00 / low $82,635.32; range $2,262.68 (2.73%)
24-hour network-wide trading volume: 16,544 BTC (approximately $1.389 billion)
Perpetual futures funding rate: four-period average +0.00512% (10-21 00:00 +0.00654% / 10-21 08:00 +0.00854% / 10-21 16:00 +0.00490% / 10-22 00:00 +0.00051%)
Active buy/sell ratio: 24-hour average 1.0364; latest 0.6655
Long/short account ratio (retail): 24-hour average 1.2670; latest 1.0222
Large-player position long/short ratio: 24-hour average 1.7797; latest 1.6499
Open interest (OI): net 24h change +3.36%, currently 98,002 BTC
Perpetual futures basis: stable within the range of -0.05% to +0.05%
Fear and Greed Index: 63 on 2026-10-21 (neutral)

24H Market Review

Phase · Early session (UTC 00-06): $83,028.14 → $82,672.00, -0.43%, 6h volume 2,035 BTC.
Phase · Early afternoon (UTC 06-12): $82,672.01 → $83,500.01, +1.00%, 6h volume 3,678 BTC.
Phase · Afternoon (UTC 12-18): $83,500.01 → $84,680.57, +1.41%, 6h volume 6,736 BTC.
Phase · Close (UTC 18-24): $84,680.56 → $84,093.42, -0.69%, 6h volume 4,095 BTC.

Upcoming Macro Calendar

🟡 2026-10-23 (Friday) · BTC October options expiry (Deribit) · Impact: medium
🔴 2026-10-28 (Wednesday) · Fed October interest rate decision · Impact: high
🔴 2026-10-29 (Thursday) · Fed Chair press conference (Warsh) · Impact: high

Long/Short Contest

Phase 4 (UTC 18-24) saw a single-phase selloff of -0.69% with concentrated volume of 4,095 BTC | It touched the window low of $82,635.32, a typical "selling pressure triggered by a negative event" pattern
OI recorded a net 24h increase of +3.36% as the price fell = active short-position buildup | OI increased by 3,183 BTC while the price fell 1.28%, a typical active short accumulation pattern
The 2.73% range reflects high volatility and intense long/short contention | The 24h range reached a recent high of 2.73%, indicating rising price volatility and increased position risk
Phase 3 (UTC 12-18) delivered a single-phase rebound of +1.41% on volume of 6,736 BTC | It touched the window high of $84,898.00, a typical "technical rebound after a negative event" pattern
Large-player position long/short ratio averaged 1.78 over 24h, indicating a mildly bullish institutional stance | The large-player L/S ratio averaged 1.78 over 24h and stood at 1.65 at the close, showing that institutions maintained a mildly bullish stance during the window
The close at $84,093.42 held the $82,635.32–$84,898.00 range | The 24h price remained within the window range and did not break below the lower bound, meaning short-term support held