Add

$$\text{Sum}_i = A_i + B_i$$

The Add module performs element-wise addition of two data series, producing a new series where each element is the sum of the corresponding elements from the inputs.

First	Second	Sum
100	50	150
-10	10	0
0.5	0.3	0.8

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Missing Data

If either input is missing (null) at a position — a data gap or a closed-market day — the sum at that position is null. The module never invents a value for missing data: a gap in your inputs stays a gap in the output.

First	Second	Result
100	null	null
null	50	null
null	null	null

Separate from missing data, a result can be mathematically undefined: adding +∞ and −∞ has no answer, so that position is also null even though both inputs exist. Any other infinite result passes through unchanged.

In live execution the module returns exactly one datapoint — the newest position — which is null when it cannot be determined.

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Input Alignment

When inputs have different lengths or frequencies, Systemic automatically aligns them:

Scenario	Behavior
Different lengths	Shorter series is padded by repeating its last value
Different frequencies	Lower-frequency series is upsampled to match
Constant vs series	Constant is broadcast to all time points

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Practical Example

Offset adjustment: Add a constant to shift a data series up or down—for example, adding transaction costs to price data or adjusting an oscillator's baseline.

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Related Modules

• SUB — Subtraction
• MUL — Multiplication
• DIV — Division