> My doubt is that i can use a NAR-NET with only Y(t) and try to forecast the future prices and find a future trend with some accuracy.
Nevertheless, since NARXNET uses BOTH output feedback and external inputs, the best way to start is
1. Calculate the autocorrelation function of the target T and design the corresponding NARNET
2. Calculate the 7 cross-correlation functions and design the corresponding TIMEDELAYNET.
Believe me, this will help immensely!
Thank you for formerly accepting my answer
Greg