Product and Order types

• What does CNC, MIS and NRML mean?
• Why is the MIS or CO position not auto squared off?
• What are the different product types available on ATS
• Why are intraday (MIS/CO) orders not allowed for some stocks?
• What are the reasons for order rejection?
• What are limit and market orders?
• What are cover orders and how to use them?
• What are stop loss orders and how to use them?
• What is the trigger price in a stoploss order?