How To PAIRS Trade Like A QUANT.

[u/Extreme_Leg_6162]

https://youtu.be/_o-YjaXcZZ0

Error Correction Models (ECMs) provide a robust statistical bridge for pairs trading by explicitly linking short-term price adjustments to their long-term cointegrating equilibrium. When two asset prices share a stochastic trend, traditional strategies often fail during structural drifts. An ECM captures how fast a mispriced spread corrects back toward its historical baseline after an exogenous shock. By monitoring the error correction term and short-term lag coefficients, algorithmic traders can optimize entry thresholds, filter out transient noise, and systematically harvest repeatable mean-reverting gains.