Investor/RT will chart whatever data their supported data vendors will send. eSignal and DTN IQFeed send data on Forex, so therefore you can chart Forex in Investor/RT, including Market Profile charts. Here's an example of TUSDJPY (using DTN IQFeed to feed it): http://www.charthub.com/images/2008/06/21/MP
Yes, Inv RT has a great product with unique capabilities. For the matter of TopGun Software, I have demo'd the software and found several tools very useful for my expansion into Forex trading. I already have one trade entry set-up using the Heatmap as a part of my primary entry signal indication. Heatmap example screenshot.......... http://www.leveragefx.com/forex/for...ing-indicator-determine-market-direction.html After I enter the trade, I then use the Heatmap as one of two primary indicatiors that determine if I stay in the trade or not (like a complex trailing stop filter)....so far I really like what I see. For myself, I have found workable studies within the TopGun software to adapt my strategies using their tools.....without having to go out and reinvent the wheel. I will be doing a lot of work this month with several Forex volume analysis ideas that I am testing out, and I will try to find ways to adapt the TopGun software for these needs......looking forward to the learning process.
No need to pay for overpriced heatmaps, there are several equivalents available absolutely free! And drawing and correlating Fibonacci levels across various time frames is a piece of cake, and also free on most charting packages! There's nothing in TopGun software that isn't available free elsewhere.