You can also use technical indicators like RSI, MA, EMA, BB. Indicators may help your NN to predict future price properly.
Thanks for the hint, but unfortunately I also included these technical indicators which gave just a minor improvement, way less than 1 percent. The NN should be able to detect patterns on its own. Calculate technical indicators based on historical data doesnt give you more information. If the network is trained well, there should at least be NO IMPROVEMENT becasue NO NEW DATA are fed in. I also would say that it should get even worse because assuming the same time for training the performance should get better the less redundant information you get. And addin gindicators should be redundant because its nothing new, its based on historical data.