HANG SENG - Could we get further decline?

I took a short at the areas at the top, it was looking very over extended. The line I always use and think when I analyse and my life philosophy - What goes up must come down - and vice versa. But the key question is - if we go below further the trend line up, and we have clear further declined I would short the further decline. However, we are at a key area and test the areas of the highs again. Smaller time frames my indicate patterns or candle formation to validate further.