Neither Bollinger Bands nor MACD is universally better; they measure different things and excel in different conditions. Both indicators serve different purposes: MACD works best in trending markets, while Bollinger Bands are more effective in sideways or high-volatility markets.
Bollinger Bands identify breakouts, while MACD confirms the direction of the trend.
The real edge comes from running them together so volatility setups get directional confirmation, which backtests show can push win rates well above either tool used alone.