The Early In-N-Out indicator is essentially an advance Squeeze signal. 

The indicator consists solely of a custom coloration of the price bars and uses the following mapping: 

Green - A volatility squeeze is currently in progress but is showing signs of expansion. Technically speaking, the Bollinger Bands are inside the Keltner Channels but have begun to expand outward indicating a squeeze may “fire” soon. 

Light Blue - Momentum is trending strongly upward and increasing. 

Dark Blue - Momentum is trending upward but is no longer increasing in strength. You will note that the bars will generally turn dark blue before the accompanying momentum shift shows on the traditional squeeze indicator. 4. Red - Momentum is trending strongly downward and increasing. 

Yellow - Momentum is trending downward but is no longer increasing in strength. You will note that the bars will generally turn yellow before the accompanying momentum shift shows on the traditional squeeze indicator.

The indicator is designed to be a companion indicator to the traditional Squeeze and provides cues for both early entries and exits. 

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About - Squeeze
​https://intercom.help/simpler-trading/en/articles/3263889

​Early In-n-Out Pro indicator Settings for TOS
​https://intercom.help/simpler-trading/en/articles/323095

About - Squeeze Pro
​https://intercom.help/simpler-trading/en/articles/318631