I am watching MACD indicator for intraday, MACD is represented by volumes and a line above it, with technicals of MACD at downside 0 to -20 and from upside 0 to 40, how to judge it?

Nishant most of your questions are quite generic, and answers for these already available on the internet. All you have to do is use Google, for example all you had to do was google for MACD and you get this link on investopedia on everything you need to know about MACD. 

Try to keep your questions specific, first search on google and if you don't find, come ask it on Tradingqna. :)