Order types & validity

How to use a Stoploss-limit (SL) order like a Stoploss-Market (SL-M) order? What is the trigger price in a stoploss order? What will happen to my intraday position if the stock circuit limits are hit? Why are market orders blocked for trade-to-trade and debt category instruments? Why can't I place an Intraday order on some stocks? Why did my market order get executed as a limit order? Why does my market order in the pre-open session change to a limit order? Why is my order pending on Rupeezy?