DislikedHugh Briss, thank you to answer my question, it is very clear
I am actually comparing H4 Stoch and H4 TDI, and it seems that most of the time, Stoch is ahead of the TDI. So, I am agree with you: there is no interest to use TDI, if we already use Stoch.
About your suggestion: How about MTF TDI, using the daily TDI and then waiting for a TDI cross on the 4 hour? Could be an idea.
I think this is impossible. Because there is no relationship of proportionality between TDI of different timeframes. For example: look at the Daily TDI...Ignored