Nadaraya-Watson Band Alert

Nadaraya Watson upper and lower band when they break this strategy gives an alert
Input Parameters
length = input.int(100, title="Smoothing Length") // Controls N-W smoothness
band_multiplier = input.float(2.5, title="Band Multiplier") // Adjusts envelope width

🔴 Compute Band Width Using Standard Deviation
dev = ta.stdev(close, length)
upper_band = mid_band + (band_multiplier * dev)
lower_band = mid_band - (band_multiplier * dev)