Stop will be above Friday’s High. If the market continues to drop, it will be a rush for the exit on high priced stocks. The trigger is shown in the photo. I believe it will be a short of the 80 day valid trend line.

If it rallies after entry just get out for a small loss, that means the market has not broken its 80 day cycle VTL and it is too early. however, a run away market below the TL will result in a strong short trade over the month of January.

Edit December 31; 2 weeks later:

I believe the market will fail into the month of February as it mives into its final 80 week cycle low. If no trendline break occurs, than theres no short. If it does break, put the stop 1/2 ATR above the breakline.