Function differenceFromFixed

Returns the difference from the initial value. Defaults to absolute difference.

const rel = differenceFromFixed(100);
rel(100); // 0
rel(150); // 50
rel(50);  // 50
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'numerical' gives sign:

const rel = differenceFromFixed(100, `numerical`);
rel(100); // 0
rel(150); // 50
rel(50); // -50
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'relative' gives proportion to initial

const rel = differenceFromFixed(100, `relative`);
rel(100); // 0
rel(150); // 0.5
rel(10);  // 0.90
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Using 'relativeSigned', we get negative relative result when value is below the initial value.

Use differenceFromLast to compare against the last value, rather than the same fixed value.