i looked at the last 4 years in more detail, # of weeks left out as there was no difference in what I looked at between 3 weeks or 8 weeks so here it is 2 races prior, race prior, derby:
2011 -
Santiva, 6 pt top, off, middle, 5th @ 35-1
Soldat, no top, off, middle, 11th @ 12-1
Stay Thirsty, no top, off, middle, 12th @ 17-1
Watch Me Go, 4 pt top, off, middle, 18th @ 34-1
2010
Nobles Promise, 3 pt top, off, middle, 5th @ 25-1
Lookin at Lucky, 3 pt top, off, middle, 6th @ 6-1
Conveyance, 2 pt top, -2, off, 15th @ 27-1, 0-2-x
Backtalk, 1/2 pt top, -2, off, 20th @ 23-1, 0-2-x
2009
Chocolate Candy, 3 pt top, -1 1/2, pair, 5th @ 10-1
Join in the dance, 2 pt top, - 2 1/2, pair, 7th @ 51-1
Nowhere to Hide, 2 1/2 pt top, -2, off, 17th @ 45-1, 0-2-x
Flying Private, 2 pt top, -2, off, 19th @ 47-1, 0-2-x
2008
Denis of Cork, 5 pt top, off, middle, 3rd @ 27-1
Pyro, no top, off, middle, 8th @ 6-1
Visionaire, 3 pt top-slop, off, off, 12th @ 25-1
Cool Coal Man, 5 pt top, off, off, 15th @ 44-1
Big Truck, 1 pt top, -3, off, 18th @ 29-1
Overall analysis seems like I wasted a lot of time as many of these horses were longshots. The most common pattern suggests that horses with big tops that then bounce then middle in the derby. Also, small -2 moves off small tops seem to run off in the derby.
Any other thoughts.