Indicator Notes|$ARIA |4-hour MACD|Bearish crossover above the zero line
Definition: The histogram is the difference between DIF and DEA; some platforms multiply it by 2. When the histogram flips from negative to positive, DIF crosses above DEA.
A common interpretation: Many traders look for bearish and bullish divergences. If the price makes a new high but MACD does not, or the price makes a new low but MACD fails to follow, this is often seen as a sign of weakening momentum.
Sizing your position based on where you place your stop-loss is far more reliable than guessing.