@tommcginnis
Best contribution so far. Are those lines proprietary or do you care to a give a quick summary?
*Thank* you. For derivation?? Go wayyyyy old school.
NYSE TRIN (first, with 15min candles and 6-period SMA)
and TICK (second, with 1min candles and possibly 6-period SMA).
The oldest advice re TICK and TRIN remains: much less important than their absolute level, is their direction. (Hence, the SMA.) Even as an option writer, I work tactically like the recovering tick scalper that I am. Pays the bills.
FWIW, I regularly go through *all* my indicators and tune them -- adjusting the various periods to what works best in big (2-hr??) slices of US-open, euro-close, and US-close. For the past 4-5 years, I end up in about the same place, but I wouldn't have confidence if I didn't test.