Looks like a rising wedge or flag leading right up to Xmas (13 bars = Dec 24). Market appears to be undecided and downright negative. A breakout above 18K leads to Santa Claus Rally. A breakdown below this wedge and the 50 DMA leads to Krampus Correction, though I would regard a break below 17,400 to be sufficient. Personally leaning towards a correction down to the 15193 low.