Posting "live" charts from various charting sitesFor "normal" images the procedure described above should be all you need. However, if you are trying to post some stock chart (e.g., from Yahoo! Finance, BigCharts.com, or somewhere else), chances are that it is "dynamically generated". You don't really need to know what this buzzword means and why it matters. All you need to know is that the software running on this site will allow you to post with IMG tags only URLs that end in ".gif", ".jpg", ".png", ".bmp", etc. - i.e., the extensions used for graphic files. But the "dynamically generated" stock charts from the sites mentioned above normally don't have such URLs. For instance, the URLs of the images of the charts generated by BigCharts.com have URLs that contain some gobledegook like "&foo=bar&snafu=true". If you try to include such an URL between the two IMG tags, this site's software will barf at you with some silly error message.

What to do, then?

Well, it's time to show the stupid computer that you're more clever than it and bypass the silly restriction.

So, it wants URLs that end in ".gif", eh? Very well, we'll give it one. Simply append "&.gif" at the end of the URL and before the closing "[/IMG]" tag. (Why the "&"? Because this character is used for separating various parameters on the URL and we don't want our ".gif" to get concatenated to some important parameter and to mess it up.)
For instance, let us assume that the original URL of the image is (the following is a single line)
http://chart.bigcharts.com/bc3/intchart/frames/chart.asp?symb=qqq&compidx=aaaaa%
3A0&ma=0&maval=9&uf=8&lf=268435456&lf2=0&lf3=0&type=4&size=1&state=8
&sid=144065&style=320&time=7&freq=1&comp=NO%5FSYMBOL%5FCHOSEN
&nosettings=1&rand=3815&mocktick=1
(Gosh, isn't that a mouthful!

)
After you put it between the two IMG tags, you get
[img]http://chart.bigcharts.com/bc3/intchart/frames/chart.asp?symb=qqq&compidx=aaaaa%
3A0&ma=0&maval=9&uf=8&lf=268435456&lf2=0&lf3=0&type=4&size=1&state=8
&sid=144065&style=320&time=7&freq=1&comp=NO%5FSYMBOL%5FCHOSEN
&nosettings=1&rand=3815&mocktick=1[/img]
After appending "&.gif" to it, you get
[img]http://chart.bigcharts.com/bc3/intchart/frames/chart.asp?symb=qqq&compidx=aaaaa%
3A0&ma=0&maval=9&uf=8&lf=268435456&lf2=0&lf3=0&type=4&size=1&state=8
&sid=144065&style=320&time=7&freq=1&comp=NO%5FSYMBOL%5FCHOSEN
&nosettings=1&rand=3815&mocktick=1&.gif[/img]
and this is ready for posting:


There's still a caveat, though.