In my 18th March 2025 idea on Hang Seng Index, I said that an ending diagonal has formed for HSI and to prepare to short (linked in this idea). I also reiterate that it will be a sharp move down because that's what proceeds from an ending diagonal.
Hang Seng Index had falled almost 1400 points since then. So what now?
I believe that it is still a short because technically, it has broken a trendline. If you still have short position, you can adjust your stop loss just above the trendline. But if you have no position and is waiting to enter, my recommendation is to scale in your shorts, but definitely short it if and when price moves up to the trendline because support should turn into resistance.
Good luck!