Most companies that sell NN software, push back propagation networks the most, and I consider them useless, they learn to predict the next incoming bar, they are over fitted, illogical and non-linear. This type of network does very little for trading markets, and they're the most difficult to train and configure as well. Stay away from back propagation, its not the way. there are superior NN solutions for trading.

Before you spend a couple hundred dollars on neural network software make sure you know about neural networks first. The subject has a steep learning curve, there is a lot of misinformation out there. learn about the different network models and what their use is for. Also try the software trials all vendors have them, and I recommend the networks that learn and adapt on their own. The networks that require extensive training are the ones that over fit. Using networks only to predict the next bar is an approach to avoid. Seek networks that enhance trend and cycle identification. These networks behave more like filters.