We watch this chart live in the trading room and it gives us a Bird’s eye View of the Auction. This is the net traded volume of the Nifty and the BankNifty today in a single bar with the day’s range in the bar. The deep reds will show you aggressive shorts entered and the greens in a downtrend are intra profit booking or new longs entered. The opposite holds true when the index is in an uptrend. The yellow are weak volumes and the white is volume squared off during the day.Together they show us areas which the market thinks are good spots to enter longs or shorts. They also show the buyers/ Sellers active today.