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Quant Daily — 21 Oct 2026

BTC market structure · 2026-10-21 UTC

BTC: $83,887

├ 50MA: $81,728 ✅

├ 200MA: $72,770 ✅

├ Realized: $53,489 (MVRV 1.57)

├ STH cost basis: $74,581

├ LTH cost basis: $48,698

├ RSI (weekly): 58.5

├ IBIT cost basis: $81,736

├ MSTR cost basis: $75,385

├ Production cost: $74,447

├ BTC/Gold: 20.3 oz

└ Fear & Greed: 63 (Greed)

ETF 5d +211M$ / 20d +553M$ · CME fwd 1/4 LONG (mild long tilt) · CLLD 1d -0.99

CSP / CC(where selling puts / calls is structurally favourable)

Week    78000/87000
Month   75000/95000
Quarter 60000/100000

Weekly

Weekly (Oct 23 expiry, 2 DTE): Deribit weekly gamma flipped positive (+$17M vs −$7M yday) for the first time in two weeks, spot above flip 82.7k — smoother tape, pin firming; gamma mass sits at 83k right under spot. Call wall 90k, put wall 78k (largest weekly OI), max pain 82k. 62% of weekly OI sits below spot after the move, but the book is trimming the low side (70k/76k puts closed) and adding a bit at 86k — compression from the edges, not a lagging board. Weekly charm −$11.7M (−$3.5M yday): the sign comes from OI sitting below spot, not from dealer positioning.

IBIT: max pain 82.5k and put wall 78.1k line up with BTC, but the cap is closer — call/gamma wall 85.2k, with new OI going to 83.4–86.9k (+23k contracts, 56% above spot). Floors agree across venues; IBIT puts the lid on earlier.

Total

Total-book DEX $4.47B, up a third day (3.31 → 3.33 → 4.47B), a one-month high — dealer net delta chasing price. Total flip 79.4k / max pain 78k stay far below, book in positive gamma; vol at the 20th pctile of the year — short-vol premium is thin.

Week ahead (beta)

109 days of history. Honest check: yesterday's 78–86k chop held — 82,964 → 83,887, the 83–83.7k upside trigger fired: spot is above the weekly flip a second day, out of the 10-day 81–83.6k band and sitting on the 83.9k zone (flip + OI build, already tested); Oct 20 session +1.3%, quiet. No components fired yesterday — nothing to check.

Base case: into Oct 23 expiry a pin at 82,500–85,000 — weekly gamma positive for the first time, spot above flip 82.7k, gamma mass 83k just below; max pain 82k BTC / 82.5k IBIT pulls from below, 85.2k (IBIT call/gamma wall, monthly gamma 85k) caps above. Week range 79,500–88,000 with cushion: FOMC Oct 28 is the macro event of the week — vol runs multiples of normal in its hours; scale, not direction, and it lands on next week's board. Backdrop leans up: ETF inflows, CME slight long tilt, DEX up a third day; liquidations day and week are short squeezes (CLLD −0.99/−0.76), i.e. the rally runs on short covering. −10% by Oct 30 priced at ~4% — no dump priced. Slow trend up.

Upside trigger: hold above 84.5k and 85.2k opens 86–87k (86k was built), 88.2k (zone + quarterly call wall) and 90k — the ceiling, no air above on the week.

Downside trigger: losing 83k and flip 82.7k sends it back to 82k and 81.8k (MA50 + IBIT cost basis, score 4); below — 79.5k (score 3 fresh, total flip 79.4k) and 78k (put wall on both venues); through 78k — 75k (puts being built at 77k/72k) and the monthly frame with put wall 70k.

Alternative: the fifth attempt in two weeks above 83k bleeds back to 82k on the double max pain by Friday — the prior four all did; in positive gamma the fade is gentler, but the 82–87k shelf is in its fourth week with spot only in its lower half. Beta.

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Structure derived from deterministic market data. Not investment advice.