OK, so you're assuming the pullback will be a pullback and support (demand line) will hold. You don't have to do that; you're not trading massive size where you need to scale in on pullbacks and you're hedged and it's other people's money so who cares what happens as long as you don't lose more than your peers...
You can watch price pull back to the demand line and then use a buy stop to get long IF price hangs out there and doesn't close below it or break down altogether.
Look at a 1-min chart and connect the 9:44 low and the 10:02 low and notice how that LTL (demand line) is honored during the 10:08 bar and price makes a higher high.
So price then pulls back as is normal in a trend, but when it reaches the line it drops further and closes below it. The long trade is off the table for now. Wait for clarity. Price pulls back to the underside of the line during the 10:18 bar and breaks down further. Breakout Pullback (BOPB) short setup now in play.
And, yes, when you're shorting in a downtrend (as opposed to shorting in a range from the range extreme), your minimum expected result is a lower low, preferably a measured move if the context to the left of your entry indicates that possibility.
So If I was entering on pullbacks (a stop-entry on the low of the pullback bar), would a valid entry be below the 10:19 bar, or would you wait until the 10:31 bar as a valid signal? My question relates to the drop below the demand line may be temporary, and it may be safer to wait for a decent break, and a lower swing high prior to taking any signals....