1) I don't have direct experience with Trade Navigator, but I have heard good things about it. For end of day data Gecko's pretty tough to beat however. The nice thing about Trade Navigator is that it has a whole slew of indicators/studies, etc.; whereas Gecko's assortment is more limited (but growing). The lack of indicators isn't a bad thing however. I've known more than a few people who get caught up with exploring every indicator known to trading only to find that none of them work, at least not in their standard formats. Indicators can be great tools, but you have to know how to tweak them. And for the most part, the common indicators work best - ones that you'll find on any basic charting program - so you don't need to spend a fortune for the exotics.
The biggest deterrent to Trade Navigator that I can see is the price. The Silver package is more in line with Gecko's pricing, and if you're only looking for EOD data I wouldn't be spending more than that. I've used Gecko for about 7 years now and I have nothing but good things to say about them. The software works well, is reasonably priced and most important, easy to use. The only thing I don't like about the EOD package is that you can only display one indicator at a time; whereas other charting software often allows you to display two or three indicators in their own "window" below the chart at the same time. I know Gecko has this feature in their live charts, but not in the EOD charts (yet).
2) Bulls 'n Bears is an interesting system and "worth it" if it suits your trading style. What I mean to say is that it requires large risk positions to begin a trade and then adjusts the risk as the trade develops. It works great in trending markets and is able to capture the better part of a move; however it's not so great in choppy/sideways markets, and the large risk amount could have you wringing your hands wondering if you're going to get stopped out, or not.
This is a problem is all "black box" systems however. They work until they don't work. No computer, or set of formulas can duplicate the judgment of the human mind. I've got a very basic set of variables I trade by, almost as good as a black box (I'm working on it!) but there is still some judgment involved, mostly in relation to stop placement and management, that is very difficult to program. But if a "hands off" trading system is what you're looking for Bull's 'n Bear's is as good as any and better than most.
3) The only charts cheaper than Gecko's are the freebies on the internet. The problem here is that the data isn't usually displayed in an easy to access format and your charts can't be saved, so each time you log on you have to reset your chart parameters. This isn't a big deal if you're only watching one or two markets, but it becomes a pain if you're doing any more than that. The two freebies I've used are BarChart and TFC.
4) There's a whack of charting programs out there - most of them expensive. Ninja trader is a good one, but you get the data feed through your broker which means you have to set up an account. The upshot here is that the broker will often pay for the data feed, so your charts are essentially free. I'm not sure how Ninja is for end of day data though as I only use it for daytrading. Another good daytrading source (sorry I don't know about the EOD data, but I think it's available) is Sierra Charts. They're a good price and good charts; however here too I think the data feed comes through a broker.
[If you're interested in Ninja or Sierra you can contact Richard Dank at ProactiveFutures.com, 1-877-393-5916. Feel free to mention my name.]
---
I don't know if that's helped you any. I'm assuming from your post that you're interested in position trading as opposed to day trading (?) If that's the case I would recommend Gecko. For the money, Gecko's really tough to beat.
Erich