MACD is one of the most versatile indicators in technical analysis, combining trend-following and momentum in a single tool. Created by Gerald Appel in the 1970s, MACD uses the relationship between two moving averages to generate trade signals. It's the go-to indicator for identifying trend direction, momentum, and potential reversals.
Key points
MACD Line = 12-period EMA − 26-period EMA. When MACD is positive, the short-term trend is stronger than the long-term (bullish)
Signal Line = 9-period EMA of the MACD Line. This is the 'trigger' line for buy/sell signals
MACD Crossover (Bullish): MACD line crosses ABOVE signal line = buy signal. Most reliable when it occurs below the zero line
MACD Crossover (Bearish): MACD line crosses BELOW signal line = sell signal. Most reliable when it occurs above the zero line
MACD Histogram: Bar chart showing the difference between MACD and Signal lines. Shrinking histogram = momentum is fading = potential reversal
Zero Line Crossover: MACD crossing above zero = bullish trend beginning. Below zero = bearish trend. This is a trend confirmation, not a timing signal
MACD Divergence: Same concept as RSI divergence. Price makes new high but MACD makes lower high = bearish divergence (very reliable warning)
MACD on Weekly Charts: Weekly MACD bullish crossover is one of the strongest buy signals in swing trading. Trades can last weeks to months
Formula
MACD Line = EMA(12) − EMA(26) | Signal Line = EMA(9) of MACD | Histogram = MACD − Signal
Pro tip — Use MACD for trend direction and RSI for timing. When weekly MACD is bullish (above signal line) and daily RSI pulls back to 40-50 zone, that's a sweet-spot entry for swing trades — you're buying a pullback within a confirmed uptrend.