Can Expire give a Short covering ?

I think we have to give market some pause,after all its 6 straight days of loss from 5287 to 4833.SGX NIFTY also showed some resistance in 4800 and closed above it.Domestic institutions buying in last two days gives some positive signs to investors.China down 10% from high while we 7.5% so market trending lower tomorrow will be a weekly bearish signal.