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Correlation
of % moves
+12%
In sync
of periods
57%
History
daysdays · through 2026-05-26
109
These move in the same direction about 57% of the time
Their swing sizes only faintly line up (~1% of the pattern is shared).
A faint pattern — interesting as colour, not strong enough to act on alone.
Both lines start at the same point — easy to compare when growth rates are similar.
What to Watch
Slipping looser
The recent pattern is looser than its long-run baseline — keep an eye on whether this sticks.
Holds in both up and down markets
The relationship is similar whether prices are rising or falling — reliable in both directions.
Mostly stable
The relationship drifts a little but stays in the same neighbourhood.
Advanced
Statistics
In sync(i)
57.4%
Headline metric
Movement correlation(i)
+12%
Based on % moves
95% CI
-8% → +30%
Likely range of correlation
Pipeline
Pipeline Summary
109 paired data points survived the daily window.
Raw input
109
1,253
Normalized
109
1,253
Prepared
109
1,253
Aligned
109
109
Invalid removed
R²(i)
1.3%
Variance explained
Significance
n.s.
Statistical confidence
Data points
109
Usable
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
+12%
No shift — both series at their actual dates.
108 overlapping points at this shift
Baseline
+12%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+12%
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
+17%
28 periods · Return correlation when both series rose
Both Falling
-18%
34 periods · Return correlation when both series fell
Diverging
-53%
46 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,144
A: 0 / B: 1144
Series A
Medline Inc. Class A common stock (MDLN)
MDLN
Stock · 109 raw → 109 prepared
Series B
DexCom, Inc. (DXCM)
DXCM
Stock · 1,253 raw → 1,253 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
14
Estimated crossover points between normalized spreads.
Slope
0.0998
Linear regression slope.
Intercept
0.0010
Linear regression intercept.
Saved 3 weeks ago · ID: stock-dxcm_stock-mdln_daily_5y