I don't put much faith in a lot of pattern analysis and in this...

I don't put much faith in a lot of pattern analysis and in this case I'm not keen on the changing level of the base of this triangle. I do use some pattern analysis though but that aside it's one area where bias can creep in so easily, almost unnoticed.

Here's a copy of Bulkowski's examination of descending triangles, his analysis over the years is purely empirical and always worth a lookup.

Descending Triangle: Identification Guidelines

	Characteristic	Discussion
1	Price trend	Can be any direction leading to the pattern.
2	Shape	A price pattern bounded by two trendlines, the bottom one horizontal and the top sloping downward.
3	Touches	Price should touch one trendline at least three times and the other trendline at least twice as distinct peaks or valleys.
4	Crossing	This is important: Price must cross the pattern from trendline to trendline, nearly filling the available space. Avoid descending triangles with abundant white space.
5	Volume	Recedes 78% of the time and gets quite low just before the breakout.
6	Breakout	Can be in any direction but is upward 53% of the time.
7	Confirmation	The pattern confirms as a valid one when price closes outside one of the trendlines.