Stock Market manipulation

The 4-500 point drops of the stock market recently can only occur by computer. Billions of shares can not be traded manually.
The only ones with enough shares and the right kind of computers to make such variations happen are institutions, not individuals.
We as individuals are being suckered by computers and institutions! They make the market move so rapidly and our little quantities are victims of their conniving. Needs investigating before they cause a depression!
They make abundant money on trades and fees, we pay it.
Last week corporate earnings of important companies were down below expectations; the credit crunch on houses is really just starting; next will be the personal credit crunch by banks on credit cards; oil will soon be $100 per barrel and gas at $4-5.00, raising the price of nearly everything else; The trillion we have contributed to the war will soon have to be added into the budget unless we can get China or Japan to carry it for the interest, as ENRON did with their crooked dealing overseas.
Leavitt and Sons have shut down building homes and even finishing what they have started. They are BIG!
The Peachtree City developer who owns the land for the Leavitt development says he will do it, I assume in conjunction with Wieland. Why would he do it now but not before by himself? What concessions does he want? Who will profit for these concessions? Better watch this one!