The MACD indicates the momentum of a cryptocurrency by measuring the difference between short-term and long-term price trends. 

The blue and red lines in the above graph represent the MACD (red) and its signal line (blue). What you want to look out for when using this tool is crossover. When the blue line crosses above the red line that is a general indication that an asset is bullish. When the opposite happens, it usually indicates an asset is bearish.