EPSILON

Quantitative evidence instrument / public access

Don’t trust
the line.
Test its neighborhood.

EPSILON turns one market claim into a field of nearby experiments. It reveals whether a conclusion survives when cost, slippage, window, or universe changes.

Run an evidence field →

Historical evaluation available · no login · no real capital

Illustrative evidence plate / epsilon.evidence.v2

Nearby assumptions.
Visible consequences.

Sample survival5/5

Illustrative claim / 01

Momentum remains directionally positive under nearby execution and sampling assumptions.

Falsified if

The return direction reverses when one plausible assumption changes while the others remain fixed.

Perturbation field / normalized equityε = one changed input
A baseline equity path compared with four atomic perturbations and one joint stress
Baseline+6.20%
Fee ×5+4.32%
Slip ×5+2.71%
Window +30d+5.18%
Narrow universe+5.83%
Joint stress+0.84%

Method / ε

A mathematical idea made into a research behavior.

y₀ = f(x)yᵢ = f(x + εᵢ)Δᵢ = yᵢ − y₀
  1. 01

    Define

    Write the claim and rejection rule before computing the answer.

  2. 02

    Perturb

    Change exactly one documented assumption in each nearby run.

  3. 03

    Challenge

    Keep assumptions, outcomes, provenance, and limitations together.