Rescale

Math · Transform

Affine remap: linearly map a value from the input range [in_min, in_max] onto the output range [out_min, out_max] (not clamped — values outside the input range map proportionally beyond). e.g. remap an RSI's 0–100 onto −1…+1. Degenerate input range emits NaN.

Rescale linearly remaps a value from one range onto another. Tell it the input range [in_min, in_max] and the output range [out_min, out_max] and it stretches or shifts the value proportionally — for example turning an RSI's 0–100 into a −1…+1 signal. It's the block for putting different indicators onto a common, comparable scale.

How it works

Each bar it applies the affine map out_min + (value − in_min) ÷ (in_max − in_min) × (out_max − out_min). It is not clamped: a value outside the input range maps proportionally beyond the output range, preserving the linear relationship. If the input range is degenerate (in_min == in_max) the map is undefined and it emits NaN. Lookahead-free.

When to use it

Use it to normalise indicators before combining them — remap RSI, Stochastic and a custom score all onto 0–1 so a weighted sum is fair — or to flip and centre an oscillator around zero. It's the standard pre-processing step for building composite scores out of blocks that naturally live on different scales.

Example

Centre an RSI: wire RSI into Rescale with in_min = 0, in_max = 100, out_min = −1, out_max = 1. Now 50 maps to 0, overbought is positive, oversold negative — a symmetric momentum input you can Add into a composite score.

Tips & gotchas

• Not clamped — out-of-range inputs map beyond the output range. Follow with Clamp if you need hard bounds.
• Degenerate input range → NaN (in_min must differ from in_max).
• Swap out_min/out_max to invert — great for flipping an oscillator's polarity.

Related blocks

• Clamp
• Percent Rank
• Constant

Inputs

Socket	Type	What to wire in
In	series / bars	Source series. BARS input uses close.

Outputs

Output	Type	Plots as	Description
mapped	series	Line · sub-pane	Value affine-remapped to the output range.

Parameters

Parameter	Type	Default	What it does
In min	number · -1000000.0–1000000.0	0.0
In max	number · -1000000.0–1000000.0	100.0
Out min	number · -1000000.0–1000000.0	0.0
Out max	number · -1000000.0–1000000.0	1.0

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Reference auto-generated from the block catalog · category Math.