Need help API for develop custom indicator

Hello, 

I am developer. I would like create a custom indicator. I need to know if it is possible get the Order buy and sell on specific level of depth. I read the API but there Is only CumulativeDomAsks and CumulativeDomBids proprieties. I would like get it separatrly only de level interested. For example: only Buys level 1, Buys level 3, or Sells level 4 , or Sell level 10 etc... I dont want cumulate the values. I woud like to get it and visualise it. I want to choose what level visualise, in my custom indicator.
There are Api Proprety or method for get it?
I hope, i to be explain me clearly.

this is an example of image to my interest values, i need to get it for my custom indicator:

Note:

For exanple in Ninjatrader i used:

protected override void OnMarketDepth(MarketDepthEventArgs e) ...etc...

...and for get the level of my interest:

private List askRows = new List();

private List bidRows = new List();

.... and after i use variable i get the levels of interest and display it.

Best Regards and have a nice Day,