As far as I know, Ichimoku is no indicator. It's a buzzword meaning several LL and HH averages with fixed shifts and time periods, supposed to give some visual market info in their combination.

If you want to use an Ichimoku component for trade signals, just put it together from the corresponding HH and LL functions. F.i. Tenkan_sen = 0.5*(HH(9)+LL(9)); etc.