Ok so you're shorting within an intraday uptrend. Have a peek at H1 we're in a longer time uptrend. Have a peek at H4 and see price has consolidated after the jog down? Even though we're trading intraday, we should always look at the TFs.
My safest bet would be to find a long back into the trend, but that is by no means suggesting I really don't exchange both ways. I could and I do.
Looking abandoned, you have supply area but one that's had one hit already. Still comfortable with this short?
Trendlines are an issue to me, they are so subjective and I am frequently uncomfortable about their efficacy. I much prefer to use horizontal lines which are far more accurate and less open to interpretation.
All that said, you have yesterday open/high up there, R1 pivot and there may be a few more supply to eat. If it does but what are your expectation you may get a response up there? 3:1? Against this trend?
Also, if you carrying off the trade this trendline, you truly don't wish to take at after price has broken that high IMO.