then yes, you meant the megaphone or broadening triangle, which is supposed to look the reverse of a symmetrical triangle
the only problem I had with your initial example, was that there was no real baseline, a clear element of support, and no expansion of the triangle
Not that im an expert and it doesn't mean it can't take any sort of form, but most of the time there are patterns you could be looking for, which aren't that obscure
also, the broadening formation ususally comes at market tops or bottoms and again in your case it would seem as though the top had already come in
just my observation of course