Yes, you can modify the details of the Stop Loss Limit Price and Stop loss trigger
Price.
For EX
Case 1:
If you had placed an order to buy 500 shares of Reliance Industries at Rs 1000/-(Market
price), the system would have placed a Stop Loss order to sell the 500 shares with
a trigger price of Rs 980/-. One can modify the Stop loss order's trigger price
to Rs 980 but not any value below 970/-
Case 2:
Case 1: If you had placed an order to Sell 500 shares of Reliance Industries at
Rs 1000/-, the system would have placed a Stop Loss order to buy the 500 shares
with a trigger price of Rs 1030/-. One can modify the Stop loss order's trigger
price to Rs 1020 but not any value above 1030/-