More experience and observation than anything i can substantiate, but you rarely see a market top with price action like we have seen for the past fortnight, especially with the middle east issues adding more concern to investors, the fact we haven't seen any "significant" follow through on the bears behalf gives me confidence in a resumption of the uptrend.
Bloomberg story yesterday noting Birinyi “While there will be corrections and while there will be pauses, we’re still of the view that this is a bull market that we expect to go on for several years.” which is as far as i am concerned totally agreeable. Couple of other points to note from the story are stats, "Even after almost doubling in 24 months, the S&P 500’s two- year return is 36 percentage points below the average bull- market gain of 131 percent since 1962, according to data compiled by Bloomberg and Birinyi Associates. The 730-day rally without a decline of 20 percent or more compares with an average duration of 1,407 days, the data show."