Identify the three components
MACD commonly subtracts a 26-period exponential moving average from a 12-period average. A nine-period average of that difference forms a signal line, while a histogram displays the difference between the two lines. These are conventional settings, not mandatory ones. Unlike RSI, MACD is not bounded between zero and 100, so raw readings are not directly comparable across instruments with very different price scales.
Separate momentum from a forecast
Crossovers and changes around the zero line describe relationships in recent price history. A shrinking histogram can indicate that the two lines are converging without proving that the underlying price will reverse. Sideways conditions can generate repeated whipsaws. Read the indicator together with the price chart and the intended timeframe, and avoid interpreting a visually striking divergence as sufficient evidence for a trade.
Assess a complete rule
Specify entry timing, exit conditions, exposure and costs before evaluating a MACD-based idea. Test what happens when a crossover is followed by a gap or immediate reversal. Repeatedly selecting the best historical parameters can overfit noise, so reserve independent data for evaluation. FYLU provides conceptual education, not a current MACD signal service or a guarantee that a past relationship will persist.