What are all the point to commodity trading?

I would like to know, as I am new in starting trading I would like to know the below things to be safe of not become any losses.

  1. What should I see before I buy or sell a commodity?
  2. What sign should be considered for buy or sell order?
  3. Should I keep watching market live show till the market closes?
  4. What are all the criteria makes the commodity market shakes?
  5. If I take a wrong decision of buy/sell, what should I do further?
  6. Is there any intelligence application developed by any of the trading platform providers to prevent loss or which alerts me before placing buy/sell order?

Thanks all in advance. These question are only for commodity market.

Read this first