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)...

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?

Then, has the following changed now? Now, PositionProfit(0) has no meaning and always return 0 ? 1. Forum https://www.multicharts.com/discussion/viewtopic.php?f=1&t=7594&hilit=positionprofit#p34658 There is no difference between OpenPositionProfit and PositionProfit(0). They return the same values. ...

I tested on MultiCharts64 Version 8.8 Release (Build 9189).
It seems that PositionProfit(0) always returns 0.