Question about MACD line

[mjstyle]

Hi tommy/doc can someone tell me how to look at the MACD lines. For example the green line is the MACD line, but what does the red line stand for also... what does these lines tell you? does it tell you the buy/sell signal and how do you know. thanks

[Tommy86]

the green line is the MACD line. it is a buysignal when it crosses the red line to the upside and viceversa.