NVDA’s MACD crossed twice. What changed each time?NVIDIA CorporationNASDAQ:NVDAInvestradeThe teal line crosses below amber first. Several bars later, it crosses the dashed zero line. Both events appear in NVDA’s October MACD sequence, but they compare different things. First: MACD versus its signal With the standard 12 / 26 / 9 EMA settings, the MACD line is the 12-bar EMA of closing prices minus the 26-bar EMA. The signal line is a 9-bar EMA of the MACD line. At the first marked intersection, MACD moves below its own smoothed signal while it is still above zero. The faster price average can therefore remain above the slower price average even after MACD crosses below its signal. Then: MACD versus zero At the second mark, MACD crosses below zero. That means the 12-bar EMA has moved below the 26-bar EMA. This comparison is between the two underlying price averages. It is different from comparing MACD with its signal line. The order is the lesson In this historical sequence, the signal-line cross comes first and the zero-line cross follows. That order is an observation from this chart, not a rule that every signal-line cross must produce a later zero cross. Neither mark guarantees the size or direction of the next price move. MACD is calculated from past prices, and its lines can cross back again. Try it Add MACD 12 / 26 / 9 to a 4-hour chart. Pick a completed signal-line crossover and check whether MACD was above or below zero at that moment. Name both the crossing and its location before interpreting it. Follow @Investrade for more Chart Basics. For educational purposes only. Securities shown are illustrations, not recommendations to buy or sell. Past performance does not guarantee future results. Investing involves risk, including loss of principal.