The 20 most similar historical sessions across 25 features, and what followed them.
Prior close profile (2026-10-23, QQQ $704.40): session -0.01% · 5-day -0.76% · vs 200-DMA +4.0% · below 52-week high -7.3% · RSI2=18 · VIX 19.4 · policy rate 3.63% (1-year -0.48)
Closest analog 2025-01-13 (distance 0.49): session -0.32% · 5-day -2.51% · vs 200-DMA +5.9% · below 52-week high -6.1% · RSI2=9 · VIX 19.2 · policy rate 4.33% (1-year -1.00)
What followed: next day -0.09% ·
5-day +3.81% ·
20-day +4.44%
Side by side | 2026-10-23 (prior session) -0.01% ↔ 2025-01-13 -0.32%; today maps to the day after 2025-01-13, which was -0.09% (single days are mostly coincidence — the Top-20 statistics below are more reliable)
| Analog (top 5) | Distance |
That day |
Next day |
5 days on |
RSI2 then |
20 days on |
| 2025-01-13 |
0.49 |
-0.32% |
-0.09% |
+3.81% |
9 |
+4.44% |
| 2019-05-28 |
0.51 |
-0.38% |
-0.82% |
-1.45% |
8 |
+4.19% |
| 2026-02-17 |
0.52 |
-0.10% |
+0.75% |
+1.09% |
23 |
+0.33% |
| 2024-04-18 |
0.52 |
-0.57% |
-2.07% |
+0.25% |
4 |
+6.75% |
| 2026-07-16 |
0.53 |
-1.64% |
-1.50% |
-1.98% |
15 |
+3.70% |
Top-20 analog statistics (deduplicated — far more reliable than any single day):
Next day mean -0.03% (up 50% of the time, range -2.8% to +3%) · 5-day +0.49% (65%) · 20-day +2.88% (90%)
Note: QQQ drifts up over time, so the unconditional probability of any given next day being positive is already about 55%. Compare the “up %” above against that baseline, not against 50%.
25 features in three equally weighted groups: price position (return / distance to moving averages / position in the 52-week range / trend slope / consecutive up-down days / gaps) + technicals (RSI2 / RSI14 / volatility / relative volume / volume trend / range / KDJ-J / Bollinger %B / MACD histogram) + environment (VIX / rate cycle / credit spreads / dollar index / oil / S&P P/E / CBOE equity P/C / AAII bull-bear spread). Weighted z-score Euclidean distance; matching pool 1999-03-22–2026-10-23 (6942 days, excluding ±60 days around the target). Narrative context, not a trading signal: after four rounds of feature engineering the Top-1 next-day directional hit rate tops out at 54.9%, still below the 57% you get by always guessing up. The data is given in full, but do not use it for direction — it answers “which historical setup does today resemble”, not “will tomorrow be up or down”.
Research output, not investment advice.