$ARB |4-hour MACD|Death cross above the zero line
What exactly does MACD measure? The zero line is where DIF equals 0, meaning the 12-period EMA and 26-period EMA are equal; when DIF is above the zero line, the faster moving average is above the slower one.
Many people also watch for bearish and bullish divergences: when the price makes a new high but MACD fails to follow, or the price makes a new low but MACD fails to follow, this is often taken as a sign of weakening momentum.
All data describe past market movements, and the market can move in the opposite direction at any time.