After retesting resistance on Friday, NQ opened with a gap-down on Monday and then trend down all day into the close.
NQ continued to sell-off during overnight trading on Monday night. If NQ should open below key support 13,300, previous high now support, we could see a sharp selling as brokers liquidate trading position on margin selling.
The next strong support is at 13,100. Should that not hold, we could see NQ dropping quickly down to 12,400 the 200-dma on the daily chart.