On Monday NQ opened above support then dropped down to support where it chop around above support for a while before break below iit and trend down all day on T=Monday.
For Tuesday NW either rally or trade sideways as long it it can stay above Monday low, which is key support for NQ on Tuesday.
If NQ can stay above Monday low we could see som,e [profit-taking and some buying which may cause a rally or sideways trading action.
Trading below Monday low is bearish and can casue a fast move down, next support is 15,550
FOMC meeting this week (Wednesday) announcement is very important for the market.