Please tell me how to place stop loss orders what will be trigger price & limit price for an order

I want to sell crude oil at 3800 but i want stop loss at 3715 then what will be the target price & limit price in SL order. I sold the same at Limit= 3715 & trigger price= 3800 but was executed at market price.

You can Read    http://zerodha.com/z-connect/tradezerodha/zerodha-trader-software-version/stop-loss-orders-limit-market

Clearly explained with screenshots.