 Let's go over a quotes delta column to the right of the book map chart next to the price ladder in This current order book column here. I'll right-click Insert a new column and then in the new column. I'll right-click again And I'm going to come down and I'm going to select the quotes delta counter here All right So the heading here is plus and minus and the data that's being displayed here Relates to the current order book But instead of the amount of liquidity per price level it's showing the delta the amount of liquidity that is either added or polled from those price levels a positive number shows that liquidity was added at that price level a Negative number is liquidity that was polled the red rectangle here is showing liquidity added or polled at the best offer and The green rectangle is liquidity added or polled at the best bid Note that the delta number resets after each update of the best bid and ask Now let's go through some of the configurations. I'll right-click here and Select configure column and the configurations are different from other columns. You can show the bid Or the ask but here you can set the maximum depth So if you want to set 10 levels Then you can see there's another bold number that pops up on the other side of this white line This is the aggregate here that is polled or added From the ask side down below. This is added or polled liquidity the aggregate on the bid side So this is a helpful tool if you want to look at very specific levels of liquidity on the aggregate So for example, let's say you want to look at the inside market like the first three or four price levels Then select three and you can look at the liquidity added and polled from those three levels and you get the aggregate as well Let's go back to a full depth You can change the colors and you can split the display Inverse that split if you like Or you can align it to the left to the center or to the right