There are only a few signals which indicate the market may be due for a pullback tomorrow.  But I think it doesn't matter if the market really pulls back.  Especially for QQQQ, it will look healthy if it pulls back tomorrow.

1.3.7 Russell 3000 Dominant Price-Volume Relationships, the Dominant Price-Volume Relationship is 1314 stocks price up volume down, which is quite bearish.  Note that the probability of seeing correction on the next trading day is high once the red comment shows up.

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1.1.C TRINQ Trading Setup.  TRINQ is only 0.39 today  which is over bullish.  Considered the up on decreased volume, I think QQQQ has a big chance to pullback tomorrow.  So far the success rate is 10/16, especially the recent two times have been inaccurate, so the probability of being inaccurate tomorrow will not be high.

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1.1.B QQQQ and VXN.  NAMO is still overbought, and Negative Divergence which I consider it unsustainable.  If QQQQ rallies further tomorrow, take notice on VXN MA(10) Envelop which is very close to oversold region.

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1.1.4 Semiconductor Holders (SMH Daily).  After 9 days of rally, it is due for a pullback.

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1.1.A PowerShares QQQ Trust (QQQQ 15 min).  The Bearish Rising Wedge is quite obvious.

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1.1.2 Nasdaq Composite (Weekly).  COMQ is testing the major downtrend line again.

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3.1.1 US Dollar Index (Weekly).  It looks like a breakout.  If tomorrow US dollar goes up further, the breakout will be confirmed.

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