The meaning of Indicator->Volume in a Quote Field=Ask chart?  [SOLVED]

In a 1-tick chart with

Chart Settings -> Quote Field = Ask
Chart Settings -> Build Volume On = Trade Volume

What's the meaning of Indicator->Volume?
Is it a trade volume at the moment ? or AskSize at the moment?

Is there any way to reference AskSize in a historical chart?

Hello Francis,

If it is 1 tick chart, the standard study "Volume" shows what the keyword Ticks returns:

With Build Volume On is set to Trade Volume the volume of the current ask tick will be returned for 1-tick chart.

Thank you. Andrew

My interest is to get the value AskSize(0) or sum of AskSize(N), N=0, 1, 2, 3, 4, 5 from historical (ie, after the market is closed) chart.
I misunderstood that if Quote Field is Ask, then volume is AskSize(0) or sum of AskSizes.

Then, is there a way to get the value DOM_AskSize(0) or sum of DOM_AskSize(N) from a hostorical chart?

Francis,

Unfortunately you cannot get any historical DOM values, only real-time values. You can collect the values into an array or a text file to reference them as historical data. There is a prebuilt DOM indicator in MC, you can open its code to see how it works.