Check normalization with a stated numerical example
Suppose the EMA difference is 2 price units and ATR is 4. MACD-V is 100 × 2 / 4 = 50. With the same difference and ATR of 8, it becomes 25. For a difference of −2, the corresponding values are −50 and −25. These are hypothetical inputs, not market observations.
For a positive denominator, the sign matches standard MACD, so their line zero crosses coincide wherever both current and previous values are available. The signal-line crossings need not coincide: an EMA of the normalized sequence is generally different from dividing the standard MACD signal by the current ATR.