Bid and ask size

[Profitmake]

I would like to plot bid/ask size into the chart.
I downloaded two indicators, one to plot the bid size, one ask size.
Unfortunately it has a few issues: (1) no historical bid/ask size couldn't be plotted. (2) The values couldn't update in real time, i.e. the values couldn't update as long as the bid/ask size changes.

The problem seems to lie on the code because it uses OnBarUpdate() which is wrong for such kinds of data. The ask size code:

        protected override void OnBarUpdate()
        {
            if (Historical)
                return;
            
            AskSize0.Set(GetCurrentAskVolume());
        }

        #region Properties
        [Browsable(false)]    // this line prevents the data series from being displayed in the indicator properties dialog, do not remove
        [XmlIgnore()]        // this line ensures that the indicator can be saved/recovered as part of a chart template, do not remove
        public DataSeries AskSize0
        {
            get { return Values[0]; }
        }

        #endregion

The indicator should use "OnMarketData()".

I believe it only takes one line or two to achieve it but I have nearly zero programming knowledge. I tried to guess "the right code" for several days but failed miserably.

What should I change in order to use "OnMarketData()"?
Could anyone kindly tell me?
Thanks a lot.

[NinjaTrader_Tim]

Hi Profitmake,

I see you have already discussed this request on another thread.

http://www.ninjatrader.com/support/forum/showthread.php?t=28959

Unfortunately, we cannot custom code this for you.