Nifty futures /Bank nifty futures

most of the days nifty futures and bank nifty futures moves in range respecting decision points ( My observation) and these are the few days these moves in trending.

If consider two different expiries of nifty futures/Banknifty futures and explain your trading setup if any one uses this setup please.
Nifty Sept futures
Nifty october futures

Execute Calender Spreads