# A gate must beat no gate

> To know what a signal adds, run the same rules without it. A signal that can't beat its own absence adds nothing.

Building block · Testing whether an edge is real · found 2026-10-02 · by John Kingola

## What I was looking for

Whether a liquidity-void entry signal added anything beyond the exits and fees around it.

## What I found

A strategy's P&L mixes the entry signal with the exits, the fees and the market's drift. Judged against zero, a winner looks like a working signal even when the exits or a rising market did the work.

In the Liquidity Engine, entering only on a liquidity-void revisit lost −4,580 per trip against −4,693 for ungated cyclers with identical exits. Indistinguishable. The registered test failed, and the comparison said why.

## The move

Every filter or entry signal I test gets a control: the same exits, fees and fills, with the signal removed.

## Evidence

- [Liquidity Engine study](https://github.com/Astralchemist/liquidity-recycling-engine/blob/main/docs/study/README.md)

Web version: https://kingola.dev/notes/a-gate-must-beat-no-gate/