General topic about indicators

Hi everybody,
I’m coming up with an issue that is bothering me for a while.
I am looking for a few indicators and any advice would be much appreciated.
Also I’m thinking that a lot of people might get use of it.

So, I was looking online, on MT4 database for a few indicators:

  1. A good volume indicator, which can tell if there is enough volume in the market to trade and the market is trending not in a range. Can use a line to tell that, ex: “above 30 line”.
  2. A “zero cross” indicator to indicate where the market goes.
  3. A “2 lines cross” indicator to indicate reversal
  4. An entry indicator
  5. An exit indicator

I know that some of them will include more that one category and that is ok.

Looking for opinions.

Thanks in advance,
Ramsa