I think I know the reason for this. You are using Zen-Fire through Mirus, and according to the Zen-Fire subsection here, you are only provided with 1-minute resolution data for the backfill. See below for more info.
Have you looked at Sierra's Historical Intraday Futures Data service? You may want to try that, as it will provide you with tick-level backfill (I'm guessing 30 days?) for free, and you would not need IQFeed unless you have some specific reason for needing it...? I have CTS as my primary data provider and I get good backfill so I have never had to use this service, but you should consider trying it. IQfeed is pretty cheap (~$80 a month with CME fee waivers) and very good but I cancelled my subscription several months back because I simply didn't need it any longer.
It will run lean just as you have experienced. I am running two copies (one using CTS broker-supplied data, the other using Sierra's free FXCM data for various indexes like dax/euro/dow/nasdaq/etc), and combined they run just over 100K, and that's with 18 charts and 3 spreadsheets open. NT started on Monday running at about 200K with 8 charts, and by Friday was up to 400K. NT's answer was to always restart every day. But I digress.
As mentioned above, I don't know why you would need IQFeed except for cases where you need an immediate backfill of the current day's data if your zen connection were to crap out (but then, why would you need data immediately if you can't trade?).
For more info on running multiple copies of SC (one for backfill with SC's service or with IQfeed or barchart) and how to set it up, see here. If you use zen and want tick-level backfill, I think this is how you will have to set it up. Again, it may seem slightly tedious at first, but it's pretty much set-and-forget. The other alternative is to consider a broker switch for different data like Rithmic or CTS (or TT, if bid/ask is not important to you), but you are probably happy with where you are so this may be a bit extreme. The other option is that you accept the 1-minute backfill data resolution, if extreme volume profile reliability is not important to you, and if delta-based studies are not important, but again, that's just an option.
Last edited by josh; March 31st, 2013 at 05:53 PM.
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Not that I USE that currently... lol!! But, if I am still giving that view a chance. I could take a year. I have not setup ZenFire yet, using all Sierra data.
Yes, that is very noticeable so far, but without live data the real test is still ahead of me. I have been having some resource issues recently, and believe NT to be a big part of the cause. Of course, it is just as likely that is the indicators I have, but I created the exact same workspaces on both NT and SC, and that 25k(k) vs 185k(k) is what I got.