Hello Kamlesh,
What exactly you're looking for in mechanical system? I've develped one using MA crossover and few other filters. System is purely mechanical and no human decision is required. (currently customized for Nifty current month futures).
I've tested (backtested for one year & live since one year) and results are wonderful. For extermly conservative settings (only 2 lots of Nifty, 25 points SL, 60 points Trail Stop) can fetch 500% earnings over last year.
Last trade was amazing as it gave buy signal at 4755 on nifty & exited around 5368. 613 points on a single trade
(in a hindsight I feel that if I would have kept 80 point trail than I would have been still in trade).
I'm still working on reentry (after stopped out) possibilities.
Do let me know should you wish to discuss about this system. Also do let me know if this is too preliminary & you are looking for something more.
Regards,