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Correlation
of % moves
+91%
In sync
of periods
87%
History
daysdays · through 2026-09-10
501
These move in the same direction about 87% of the time
When one swings, the other almost always swings by a closely matched amount (~84% of the pattern is shared).
Strong enough to use as a signal — check the stability and regime notes below before relying on it.
Both lines start at the same point — easy to compare when growth rates are similar.
What to Watch
Unusual right now
Recently tighter than usual — the pair is behaving differently than its long-run pattern.
Holds in both up and down markets
The relationship is similar whether prices are rising or falling — reliable in both directions.
Rock solid
The relationship barely changes from period to period — treat it as a reliable signal.
Advanced
Statistics
In sync(i)
87%
Headline metric
Movement correlation(i)
+91%
Based on % moves
95% CI
+90% → +93%
Likely range of correlation
Pipeline
Pipeline Summary
501 paired data points survived the daily window.
Raw input
730
668
Normalized
730
668
Prepared
730
668
Aligned
501
501
Invalid removed
R²(i)
84%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points(i)
500
Robust
Time-Shifted Correlation
See how correlation changes when one series is offset in time. A taller bar at a non-zero shift means the two move together better when one leads the other — that's a potential lead/lag signal.
Correlation by shift
Click a bar to inspect. Range: -6 to 6 days.
Selected shift
No shift
Correlation at this shift
+91%
No shift — both series at their actual dates.
500 overlapping points at this shift
Baseline
+91%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+91%
A non-zero peak suggests one series lines up better when shifted against the other.
Stability
How the correlation evolves over time. A stable line means the relationship is reliable; large swings signal regime-dependent behavior.
Do They Crash Together?
How these series behave when markets are rising, falling, or diverging. A correlation that holds in drawdowns is very different from one that only works in rallies.
Both Rising
+93%
116 periods · Return correlation when both series rose
Both Falling
+95%
119 periods · Return correlation when both series fell
Diverging
-60%
14 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
396
A: 229 / B: 167
Series A
Bitcoin (BTC)
BTC
Crypto · 730 raw → 730 prepared
Series B
ARKB
Stock · 668 raw → 668 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
22
Estimated crossover points between normalized spreads.
Slope
0.9392
Linear regression slope.
Intercept
0.0000
Linear regression intercept.
Saved 3 weeks ago · ID: crypto-btc-vs-stock-arkb-daily