Hey there. You have to use this code :D
![](imageurl.png)
Just replace the imageurl.png part with any image file you have on a site (to include discord) it just has to end in an image format.
Additionally if you want your forum signature to link somewhere use the following.
[![](imageurl.png)](urllink.com)
Again, replace imageurl.png with pic you want, and urllink.com with the link you want linked to.