Not

The NOT module inverts each boolean value in a series, transforming true to false and vice versa.

$$\neg x = \begin{cases} \text{true} & \text{if } x = \text{false} \\ \text{false} & \text{if } x = \text{true} \\ \text{null} & \text{if } x \text{ is missing} \end{cases}$$

Input	Output
true	false
false	true
null	null

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Missing Data

A datapoint can be missing (null) — a data gap, or a closed-market slot such as a weekend on a stock series.

• A missing input produces a null output at the same position. The inversion is never faked: a gap is not "false", so NOT never turns it into an affirmative true signal.
• NOT itself has no invalid inputs — every boolean has a negation — so a null output always means "no input datapoint here", never a math error.
• In live execution the module returns exactly one datapoint (the newest slot), which is null when that slot has no input value.

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Numeric Interpretation

⚠️ Important: When the input is numeric rather than boolean, the NOT module converts values before inverting:

Numeric Value	Interpreted As	After NOT
0	false	true
0.0	false	true
1	true	false
-5	true	false
0.001	true	false

Rule: Zero (including 0.0) is false. Any non-zero value—positive, negative, or fractional—is true.

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Practical Example

"Trade except during high volatility" — Use NOT to invert a high-volatility flag, then combine with AND to filter your entry signal. The result triggers only when volatility is not high.

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Related Modules

• AND — Logical conjunction
• OR — Logical disjunction
• EQ / NEQ — Equality comparisons