LOL, I think the flag pattern is a little different then the cup & handle pattern. C & H patterns are long term plays, flag patterns are short term plays. So I don't think you can rely on SLV being a flag pattern.
Today it dropped, guys had puts on this with strike prices way below where it was trading yesterday, I don't know to much about options, but if your looking to make a profitable trade you need to take them into consideration, IMO.
That is actually called a down channel. With upper channel break wihich also breaks $34 resistance. Enrty is OK and short term target would be $38 gap fill.