On long term Nasdaq chart, one would notice a 1-2-3 or a-b-c formation with the 2nd or b wave as a triangle.
From 1974 low to 2000 high, it rose 5078 points.
And from 2009 low to recent high it again went up 5195 points, roughly the same as the previous up-wave.
IF the two waves are to be of the same magnitude, as the case often is, a correction is around the corner.