— Shareable card —
Boston Snowfall × SPY 20-day SMA
When bos_snowfall and spy_sma_20 both have unusually large moves in the same direction within 10 days of each other, the market has followed in that same direction 100% of the time over the next 180d in our 2010-2019 records (21 examples), and 100% of the time in held-out 2020+ data (9 examples). Held up both periods.
$p—cross-indicator · out-of-sample
Boston Snowfall × SPY 20-day SMA
When bos_snowfall and spy_sma_20 both have unusually large moves in the same direction within 10 days of each other, the market has followed in that same direction 100% of the time over the next 180d in our 2010-2019 records (21 examples), and 100% of the time in held-out 2020+ data (9 examples). Held up both periods.
ReadReliable bullish pair
Val. hit rate100%
Held-out n9
standardpoorly.comas of 2026-05-06