I have mentioned my risk management method in earlier post. However there is no harm in explaining it again.
If you have notice I enter into strangle. I sell put and call in pair. Therefore I collect premium from both the sides.
Ordinarily my risk management method is to wait until the premium of increased to the total of the premium collected from both the side.
Suppose I have collected premium (I just remember I have not posted the outcome of the May series) of Rs. 20-00 from May 5400 CE and Rs. 20-00 from 4900 PE. Then total premium collected is Rs. 40-00. So, I in case the premium of either of the option reaches around Rs. 40-00 I would square off the loosing option. And mostly the premium of the other side's option would be negligible , so I might square off the other side's option as well, if there is chances of such bounce back.
Last month I had square off 4900 PE @ Rs.38-00 as the market was moving down fiercely and at one time move below 4800, its another matter it did not close below 4900.
In volatile time option seller has to keep keen eye on the premium and should be able to make quick decision. It is always better to square off a doubtful option, as in option selling profit is limited and loss is unlimited. So when you square off a position you know you are waiving limited profit against the risk of unlimited risk.
Thanks for your interest!