heading towards minus 500 points

Just crunched the numbers through my complex modelling system. Dow gone from 12,000 to 6500 in 6 months. My calculations show that this trend appears to have the DOW heading to -500 in 7 months. Correct me if you will but I've done the sums on 3 different calculators and gone through the maths over a dozen beers with my neighbour - and he was grateful for the beer.no arguments from him. Discuss.