WHAT NEXT WITH SENSEX ?? JUST MOVING IN A SIDEWAYS TREND.

Sensex has felled by almost 200 points from the past 1 month.
It is just moving almost in a SIDEWAYS trend.
Is this happening because of the excessive valuation of sensex ???
Acc . to RBI the valuation of SENSEX AND NIFTY are higher than expected.
Is this the cause of this SIDEWAYS/DOWNTREND ??