@Jitu80
We can not put two orders (sell + buy) at the same time. Not in our exchanges in India. First you have to short the scrip @ 100 with Limit order. No trigger required. Once the order is executed, you put a stop loss buy order to cover your position.
Here you have two scenarios.
1) to protect your capital. Depending on how much you willing to loose to get this trade into profit. Risk management. So, assuming LTP is @ 100 currently, you place stop loss buy order with trigger @ 106 and Limit @ 106 or higher.
If the trade moves against you, your capital will be protected.
2) Now if the price continues to go down (as you expected), just put a buy Limit order @ 96 and cover your short sell.
And the third way of doing it is Trailing Stop loss.
Two things you have to remember for a stop loss order is (this is where most of the confusion is)
For a stop loss buy order LTP should be lesser than your trigger.
For a stop loss sell order LTP should be higher than your trigger.