Predict Stock Market by neural network

How can we predict future market stock by neural network? It is very complicated but possible.

Neural networks can be used for prediction with various levels of success. The advantage of then includes automatic learning of dependencies only from measured data without any need to add further information (such as type of dependency like with the regression). The neural network is trained from the historical data with the hope that it will discover hidden dependencies and that it will be able to use them for predicting into future. In other words, neural network is not represented by an explicitly given model. It is more a black box that is able to learn something.

First of all we have to train our neural network. Train is based on windows, each window has collected values from past.

Thanks past values using special algorithm, e.g Backpropagadion function neural network can predict a few next values.