// Licensed under the Apache License, Version 2.0
// © mihakralj
//@version=6
indicator("Square Root Transformation (SQRT)", "Sqrttrans", overlay=false)

//@function Applies a square root transformation (y = √x) to the input series.
//@param source series float The input series to transform. Must contain non-negative values.
//@returns series float The square root transformed series. Returns na if source < 0.
//@optimized for performance and dirty data
sqrtT(series float source) =>
    if na(source)
        na
    else if source < 0
        na
    else
        math.sqrt(source)

// ---------- Main loop ----------

// Inputs
i_source = input.source(close, "Source")

// Calculation
transformedSource = sqrtT(i_source)

// Plot
plot(transformedSource, "Sqrttrans", color=color.yellow, linewidth=2)