The stock near an important level which has acted as support for some time now.
A break and close below 635 may lead to further fall up to 882 levels.
Alternatively one may consider the following strategy
Sell HCL TECH Jan expiry
660 CALL OPTION
around 22
Lot size 700
The strategy has a max profit potential of Rs 15400 if HCL closes anywhere below 660 on 31st Jan. Inbuilt Loss protection for a rise on stock up to 682 on expiry day