as volume is decreasing with price increase ....on weekly charts...indicating a danger signal to bulls...
According to Charles Dow, Volumes always increases when prices move in the direction on the main trend.
in January 2004,a correction came. Again price started moving up again. but this time volume was din't boosted and this was the first signal of correction and finally the uptrend had reversed.On last trading day maximum Nifty constituens shown bearish candle...Be cautious