The price is trading low following a huge gap down..so the price must test its gap down level which is 733 to 718 also there's chance of short covering after a good sell off. For swing trade, good buy above 664 after retest for a target price of 672 & 676 and good sell is below 656.45 for a target price of 646 & 637.85.
Trade wisely at your own risk,
Good luck, Jai Hind.