Bitcoin Radar · Month of year · as of 01 Nov 2026 close
Bitcoin Month of year: Close in September Neutral
First daily close of September. Below: the 1 week, 1 month and 3 months after every initial trigger since 18 Aug 2011.
- Current Month
- November
- Median next 1 week
- -2.7%
- Median next 1 month
- -2.0%
- Median next 3 months
- +25.4%
- Occurrences
- 16
About this signal
Close in September is a neutral Month of year signal: First daily close of September.
Seasonality groups forward returns by the first daily close of each calendar month. It is a description of the past, not a mechanism.
Formula. Signal turns on at the first UTC daily close of that calendar month.
"Close in September" is a neutral Month of year signal: First daily close of September. On the 16 occasions it first turned on since 01 Sep 2011, the median return over the next 30 days was -2.0% (mean -2.9%, 44% positive) against a baseline median of +2.9%, a median edge of -4.9%. The 1-week median was -2.7% (44% positive) and the 3-month median +25.4% (60% positive).
Forward returns after "Close in September"
| Horizon | n | Median | Mean | Win rate | Best | Worst | Baseline | Edge |
|---|---|---|---|---|---|---|---|---|
| 1 week | 16 | -2.7% | -2.4% | 44% | +10.7% | -15.1% | +0.7% | -3.4% |
| 1 month | 16 | -2.0% | -2.9% | 44% | +22.5% | -41.4% | +2.9% | -4.9% |
| 3 months | 15 | +25.4% | +66.3% | 60% | +756.8% | -61.2% | +10.3% | +15.2% |
Most recent times the signal turned on
| Close date | BTC close | Next 1 week | Next 1 month | Next 3 months |
|---|---|---|---|---|
| 01 Sep 2026 | $77,397 | +1.4% | +9.6% | pending |
| 01 Sep 2025 | $109,244 | +2.6% | +8.6% | -17.3% |
| 01 Sep 2024 | $57,310 | -4.3% | +6.1% | +68.3% |
| 01 Sep 2023 | $25,798 | +0.4% | +8.5% | +46.2% |
| 01 Sep 2022 | $20,128 | -4.0% | -4.1% | -14.7% |
| 01 Sep 2021 | $48,853 | -5.7% | -1.4% | +16.6% |
| 01 Sep 2020 | $11,924 | -15.1% | -10.9% | +65.2% |
| 01 Sep 2019 | $9,768 | +6.5% | -14.8% | -22.7% |
| 01 Sep 2018 | $7,185 | -14.0% | -8.5% | -44.7% |
| 01 Sep 2017 | $4,922 | -12.4% | -11.1% | +102.1% |
| 01 Sep 2016 | $571.05 | +9.6% | +7.3% | +29.9% |
| 01 Sep 2015 | $227.96 | +7.1% | +4.0% | +65.3% |
Distribution of outcomes
Histogram of Bitcoin's forward returns after this signal. The vertical axis is the number of triggers; the horizontal axis is close-to-close return, compressed so large outliers do not hide the typical range. Bars left of zero are losses, right are gains.
1 week
Forward return (compressed scale)
1 month
Forward return (compressed scale)
3 months
Forward return (compressed scale)
Methodology
- Data. Bitcoin (BTC/USD) daily closes from Bitstamp, 18 Aug 2011 to 01 Nov 2026 (5555 closes). One exchange, one series, no splicing.
- Trigger evaluation. Evaluated strictly on the initial daily close when the signal condition turns active (the first close after being inactive). Consecutive ongoing closes are excluded to prevent signal dilution and sample clustering.
- Forward return. For horizon h in {7, 30, 90} days:
close[t + h] / close[t] - 1, both daily closes. Indicators use data up to and including close[t], so there is no lookahead. - Statistics. Tables show the median return because Bitcoin's return distribution is right-skewed; the mean is on hover (and in the detailed columns). Also published: occurrence count n, win rate (share of positive returns), and the unconditional Bitcoin baseline over the same horizon. Edge = median minus baseline median. Signals with fewer than 3 occurrences are omitted.
- Caveats. Rare signals have small samples. External series start later than price (Fear & Greed 2018). Open interest and long/short ratios are excluded because no reliable multi-year history exists.
- Refresh. Recomputed once per day after the 00:00 UTC close. Last computed 2 Nov 2026 00:10 UTC.