Thanks for the posts guys.
To CoralReef:
You have to contact DTN/IQ Feed and EW to make sure there are no incompatability issues between the data feed and the charting program.
They recently helped with some problems I was having with the QuoteTracker charting system, and it is possible that there is a problem somewhere.
If not, then it goes back to being a data feed issue, and you will have to try to work around it, or try to get another data feed provider who doesn't have those problems with their charts.
IB is one (although they do require high intra-day margins) and Mirus Futures with the Zenfire Data feed is another.