Observations:
if demand acts as Supply, fall is going to happen from here.
previous strong bullish from 1680 level, if acts as price turned to be bearish in HDFCBANK.
------->>After trending upwards, a strong breakout is given above 1700 level, with consolidation ,which is previous resistance got broken strongly.
------->>Now with opening a huge gap down, showing bearish pressure pushes the price towards downside, if this is a sign of reversal in HDFCBANK,
It's an opportunity to enter short again from these levels.
-------->>Keep on sell side as long as price is near 1680 levels. previous strong upside movement is happens here, which may acts as bearish turn in HDFCBANK. Keep look at this level it may turn bearish again.
if price again breaks 1650 levels be on sell side to 1630,1610 levels.