 The book and volume and balance indicators are located here in the upper right hand corner of the bookmap chart. You'll need to subscribe to the add-on package in order to gain access. Both indicator outputs are derived from the same calculation. However, the volume and balance indicator is based only on the transactions here within the viewable chart. The book and balance is based on the calculation for both the current and historical order book within the viewable chart range. You can see the output is based on a percentage here or based graphically here with the zero line being in the middle. Let's right-click on the indicator and select the order book and balance settings. You can see we have several settings here for the order book and balance. You can also click down here for the volume and balance and there are no settings. That's because the calculation is being made only for one price level based on the transactions. You can click here for more information. Let's go back to the order book and balance settings here. You can calculate the number of levels you'd like to have outputted here. Let's select 20. So that means 20 levels above current price and below current price are going to be calculated for my order book and balance. You can also have it outputted by the percentage from the best bid and offer here or you can calculate all of the price levels. Let's go back up to 20 and we'll go over the weighted options here. When this box is selected this is the half-life distance in number of price levels. Currently we have five selected. What this means is that the first five levels above and below current price are going to be weighted twice as important as the next 15 levels in the entire calculation. You can also have sound alerts enabled here. You can have it enabled for when one side is greater than another by percentage. Also when the bid outweighs the ask or ask outweighs the bid or for both. And you can see here you can also customize the output of the alert.