Chance of at least one five loss run at a 70 percent win rate, by series length
Answered against 22 years of US equities and 12 years of US options data and published with the query that produced it. This result is stored as of 2026-08-17, from How Long a Losing Streak Is Normal.
| series_length | pct_run_of_5 |
|---|---|
| 50 trades | 7.659 |
| 100 trades | 15.256 |
| 200 trades | 28.627 |
| 400 trades | 49.373 |
| 1000 trades | 81.931 |
- Rows × columns
- 5 × 2
- Computed
- Completeness
- No missing values
- Source
- US exchange, SIP and OPRA market data
- Licence
- Strasmore terms · free, no signup
What each column holds
| Column | Type | Range | Notes |
|---|---|---|---|
series_length |
text | 5 distinct values (100 trades, 1000 trades, 200 trades…) | |
pct_run_of_5 |
number | 7.659 to 81.931 | percent |
Computed from Strasmore's warehouse of US exchange, SIP and OPRA market data. Equity prices are delayed; options greeks and implied volatility are end-of-day. This result is stored, not recomputed on load — it is exactly the numbers that were returned on , and the query below is what returned them.
Run it yourself
This is the exact query behind the result above. Change a ticker, a date or a column and run it against the warehouse — no account, no key. The no-signup tier is smaller than the one this page was computed on; a query that reaches past it comes back saying which plan runs it.
WITH 0.70 AS win_rate
SELECT
concat(toString(n_trades), ' trades') AS series_length,
round(100 * (1 - arraySum(arrayFold(
(run_mass, trade) -> arrayPushFront(
arrayMap(mass -> mass * (1 - win_rate), arrayPopBack(run_mass)),
win_rate * arraySum(run_mass)),
range(n_trades),
[1.0, 0.0, 0.0, 0.0, 0.0]))), 3) AS pct_run_of_5
FROM
(
SELECT arrayJoin([50, 100, 200, 400, 1000]) AS n_trades
)
ORDER BY n_trades
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