Eye on QQQ Ahead Of NVDA Earnings

QQQ is in the grasp of a nearest-term pullback off of last Thurs recovery rally high at 485.54 (8/22) into this AM's pre-market low at 472.64, which so far amounts to a shallow 20% retracement of an August upleg from 420.00 to 485.54 that exhibits bullish form. If the retracement extends to Fibonacci 38% to 50%, then QQQ could press into the 460.50-452.50 Target Support Window before my expectation of the emergence of another upleg that challenges and hurdles last Thurs. high at 485.54. 

In any case, as long as NVDA earnings don't disappoint investors in some unexpected way that presses QQQ into an acute bout of selling pressure that breaks the August low at 420.00, my pattern work expects the emergence of a new upleg in reaction to Wed's earnings news... Last is 473.18