IMHO, how about right below the the line you've drawn?
If you want to give yourself a little more slack how about the low/open of the day that popped in early August? That way it looks like you still have a good 3:1 reward/risk if it gets back to the top of the channel.
I used the daily to estimate (See the green Stocastics vertical bars on the 50% rise. It tays "overbought" for the whole traverse. It will happen soon; either end of week is not likely, I feel.
If you pick it off within a day of the next traverse of your IT trend channel beginning. It will turn out nicely anyway.
There are stocks like your popping every day. Fun chart to work on.