How do I place a cover order for FNO by computing the profit? E.g. I have a Strangle who has started making a loss. But I want to keep a Stop Loss on this. How do I compute this? What is the latest price that I can use? I used the 'last price' and 'depth.buy.get(4).getPrice()', both of which are giving me a wrong results. I compute the formula as below: