This could be a normal strong volume on a breakout above 1810.00 resistance, however volume spikes following a sustained up or down trends usually signals a pullback.
If the index manages to break and hold below 1810.00 that may favor the bearish scenario, Otherwise bullish trend remains intact.
If the index manages to break and hold below 1810.00 that may favor the bearish scenario, Otherwise bullish trend remains intact.