Have to think in reverse...high trin is price extended to the downside...low trin price extended to up side... Stochastic of the TRIN =THINK in reverse also=oversold reading means price is extended to the upside...stochastics in upper level=price extended to the down side...Stochastic fastline cross slow line and the indicator's 20 and 80 signal line are still valid...just have to think in reverse as relates to price... TRIN is the market internals- advancing/declining and the volume that goes with them...The formula for the Arms Index is simply:(Advancing Issues / Declining Issues) / (Advancing Volume / Declining Volume)