1 - Script-based WatchList management functions have been a long-time enhancement request.
Open Issues:
QUOTE:
(757) Dynamic WatchList Support
It's currently marked as deferred, meaning that it will not appear in 6.3 or 6.4.
2 - Without some good clarification I fail to understand what it means. If that "Watchlist emulation" (whatever it is) is in some way related to #1, see my reply above. At any rate, have you seen the WatchList provider extension?
3 - What for? Both Yahoo and IQFeed provide just enough historical data for long-term testing.
Even if you presented something more than an "Eureka!" as a reason for mixing the data by different providers, we're not going to consider this. On one hand, it's one hell of work to add this to the dozens of static providers which already exist out there. On another hand, there's a snowball's chance in hell that Wealth-Lab static provider API would be extended for this.
<<If import Yahoo Daily data in IQFeed, need change "-" on ".">>See what I mean by saying it's one hell of work? (No way.) Each provider has its own symbology, and so will be.
Since this falls into the custom solution category, my suggestion is:
a) Complicated: Develop your own static data provider to mix two data feeds together.
b) Simple: Write a Strategy to append one Bars object (e.g. Yahoo) to another (e.g. IQFeed). You'll find a number of examples in the Wiki FAQ, in the QuickRef (SaveToFile, LoadFromFile), and on the forums.
4 - If you mean the issue with properly compressing tick-based charts into higher bar scales by some providers (ASCII, Database), then we will subset of our users, we can not realistically expect to raise this issue's priority for there are more important tasks to focus in 6.4+. Sorry.