You might want to check out this bunch of posts concerning bid/ask:
as I think John Bowles is the new master of this type of code writing.
I don't think you can turn off prior plots that have actually printed on the chart, although it is possible to turn off old trendlines (I think). Sorry I am not too much help, but I have wondered this same thing and have wandered down this road before and from my years of experience, I think the charts would flicker like crazy if they constantly were changing old indicator values.
Also, about volume in EL. Your idea is WAY overdue. Check this out:
and then my big Rant here:
I like to bump it every chance I get. But at the rate of development and the emphasis on back testing and portfolios (which is excellent compared to TS, BTW) I don't think us intraday traders will get very much for probably a year, from TSS. I am very satisfied by NT right now and use whitmarkdevelopment.com to re-write indicators I have developed in MC so that I can trade right off the charts of NT. They are able to access the 5 bid and 5 ask levels and have a very nice ACV indicator that measures the ratio of total bids to total asks. For an example (from my friend in Seattle, Bill Shepard) see:
http://www.vstraderllc.com/vsttriplewav ... derllc.htm
I absolutely love MC for dev work and will continue to use it because I code with EL/Powerlanguage. But I am a trader and need the tools that work and say why "fight the trend?" I don't want to jump from AB to neoticker to something else then something else... NT solves some problems right now for me and MC is heading in that direction slowly. I really like the attitude of both organizations toward user friendly development, unlike another Florida based company that has totally abandoned improving their software platform and continually ignores their established old customer base.
Plus, I kinda have a crush on Marina.
Hope that helps,
Los Altos, CA