Flat Base Setup
O'Neil's second-stage setup. After a stock has already made a meaningful advance, it consolidates in a tight, flat range — no more than 15% depth — for at least five weeks. Flat is the key word: there's no rounding or dramatic dip. This shows the stock is under heavy accumulation and sellers can't push it down.
Historical replay numbers are unavailable because the artifact is stale (source bars are 15 days old). The page does not substitute zeros or older results.
How this is measured →Setup Criteria
- › Prior uptrend of at least 20% before the base
- › Base depth: maximum 15% from high to low
- › Base duration: 5+ weeks
- › Very tight weekly closes — almost no range
- › Volume dries up during the base, surges on breakout
Breakout above the flat base high on 40%+ above-average volume.
Just below the bottom of the flat base.
What Happened Next
Forward returns after the scanner first flagged a Flat Base (score ≥ 70, gatekeeper passed, one signal per base) — computed from stored daily bars, no lookahead. 95 historical signals.
| After | Median Return | % Positive | Sample |
|---|---|---|---|
| 5 sessions | +1.4% | 55.8% | 95 |
| 10 sessions | +1.5% | 56.2% | 89 |
| 20 sessions | +2.1% | 63.8% | 58 |
Median best move inside 40 sessions: +6.0% · median worst drawdown: -3.3%. Past scanner behavior does not guarantee future outcomes. Not investment advice.
Today's Flat Base Setups — 6 found
| Ticker | Score | RS | Trend |
|---|---|---|---|
| BEN Franklin Resources, Inc. | 81.5 | 78.0 | ✓ |
| EA Electronic Arts Inc. | 80.6 | 32.0 | ✓ |
| OGN Organon & Co. | 92.6 | 75.0 | ✓ |
| QQQ | 55.0 | 28.0 | — |
| SPY | 55.0 | 21.0 | — |
| TFX Teleflex Incorporated | 55.0 | 16.0 | ✓ |
