Nasdaq 100 (NDX) First support is at 1918.10. First resistance is at 1939.77. For the Nasdaq 100 Index Tracking Stock (QQQQ) first support is at $47.19. First resistance is at $47.68. S&P 500 (SPX) First support is at 1115.71. First resistance is at 1128.77. For the Standard & Poor's Depository Receipts (SPY) first support is at $111.80. First resistance is at $113.18.