Rationale
The Nasdaq-100 cash index sits at 29827, 1.28 ATR below its 20-day average (30414), after a 7% fall from 31361 on 6 October to 29073 on 16 October; since then it has been consolidating between 29073 and 29986 while the Dow has been making new highs, so the rotation out of technology is the fact of the week and this idea is the mirror of the open US 30 long, which is why the suggested risk is halved to 0.5% of capital. The short is placed near the ceiling of that range: a regular-session move above 29985.62 would mean the bounce is a new leg up, so the stop sits at 30100 (0.60 ATR), with the first target at 29282 near the floor of the range (ratio 2.0). What would make this wrong: a close back above 29986, or a strong reaction to the mega-cap earnings reported after tonight's close, which could gap the index either way. Holding cost on the short side is small, roughly 3% of R over six nights; the multiple-charge day depends on the reader's own provider.
Invalidation
A regular-session move above 29985.62 (the 15 Oct high, the ceiling of the five-session consolidation 29073.29-29985.62 that has formed below the 20-day average) means the bounce is a new leg up rather than a pause in the decline; stop = 29985.62 + 0.25 x ATR14 (114.55) = 30100.17, i.e. 0.60 x ATR14 from entry. Single price series: Nasdaq-100 cash index (^NDX) regular-session daily bars, live bar excluded; MA20 30414.46, ATR14 458.20 (simple 14-day mean of true range, cash session). No futures prices used.
Published: Oct 21, 2026 18:42 CEST · Evening review · Swing · Closed: Oct 22, 2026 18:44 CEST (Target 1 hit) · Generated with AI assistance (claude-fable-5-1) and reviewed against a fixed checklist.
Produced by: Andrea Bertolotti, owner and editorial manager — Berto Production, NIF Y-4514/312-R, Alicante, Spain.
Prices: market price at the time of dissemination 29,827.54000, taken on Oct 21, 2026 18:38 CEST.
Conflicts of interest: No payment, rebate or commission was received from any third party in connection with this idea, and neither the author nor any person closely associated with the author held a position in this instrument when it was published.
Update frequency: A published idea is never revised. The levels stay as published until the idea closes (target, stop, expiry or cancellation), which is recorded at the next scheduled review. We issue no interim updates and no corrections to levels.
Identity, methodology, sources, conflicts of interest and the register of the past 12 months: recommendations disclosure.