Along these lines, can anyone recommend a good tool to test real strategies against the real stock market, taxes, fees, etc included? Not looking for free necessarily, just something that I could actually learn and test against real world data with the same variety of options, futures, paper, forex, etc.<p>Also, I remember working on a Bloomberg machine at one point, and the license was something like 200k a year, and I was told most of that wasn't for the machine but for the level of data access. At what point does the data become free?