With 2 USA main indexes on significant resistance, it is time to revisit the top checklist.

Sum - maybe, but even if so the first drop after highs is usually not the threatening one. Even before that, SPY and VTI are at levels without any sign of rejection yet. We'll see what happens.

1) Multiple USA mains on pivot resistance, then rejection?
SPY and VTI on significant resistance for part a, but no rejections yet.

2) VIX and XIV confirmation?
Both fine so far. VIX above a monthly pivot would be the first sign of serious trouble.

3) Other technicals like RSI overbought and/or divergence, or higher timeframe issues?
RSI overbought or approaching overbought on daily charts, weekly and monthly charts for SPY, DIA, QQQ and VTI. So other technicals show more chance of top.

4) High tested with at least one lower high?
No.

5) Safe havens showing concern?
GLD yes, TLT no.

6) Breadth or volume divergence?
Yes on daily, but not on weekly.

7) Sentiment extremes reached?
Yes in December, but not in 2017.

8) Valuation concerns? Fundamentals weaker?
SPX at current 10 weekly moving average of 17.5x foward earnings. Maybe somewhat in this regard. Fundamentals still strong though.

9) Timing?
2/10 was one of the dates in February.