1. A method for predicting at least one investment significant parameter of a financial instrument for placing an order for the financial instrument, using a computer, the method comprising the steps of: a) generating a model of the at least one investment significant parameter of the financial instrument using the computer, the model based on a set of historical quotes of at least one of bid prices of the financial instrument or ask prices of the financial instrument and a selected financial model type; b) selecting at least one of a bid stream of the bid prices of the financial instrument or an ask stream of the ask prices of the financial instrument based on the set of historical quotes on which the model is based; c) applying the selected at least one of the bid stream or the ask stream to the model; d) predicting the at least one investment significant parameter of the financial instrument by using the computer to operate the model based on the at least one of the bid stream or the ask stream applied to the model in step (c); e) storing the at least one predicted investment significant parameter of the financial instrument in the computer; and f) placing a buy or sell order, using the computer, for the financial instrument based on the at least one predicted investment significant parameter, wherein step (a) includes the steps of: a1) selecting a financial model type to be input into the computer based on the financial instrument, the financial model type having at least one variable parameter; a2) inputting the selected financial model type into the computer; a3) inputting the set of historical quotes of at least one of bid prices or ask prices into the selected financial model type; a4) initializing the selected financial model type by initializing the at least one variable parameter of the selected financial model type; a5) applying the set of input historical quotes of the at least one of bid prices or ask prices to the initialized financial model type to estimate the at least one variable parameter; and a6) generating the model of the at least one investment significant parameter of the financial instrument based on the estimated at least one variable parameter, wherein the generated model is verified to match historical behavior of the financial instrument to within a predetermined degree of accuracy.