Atleast RSI catches bottoms and peaks ,but not always.
I am giving 2 live examples of HDFCBANK and DLF.
HDFCBANK
The peak price of this bank is not peak value of its RSI but it was far below.
Similarly Peak value of RSI is not coincident with peak value but still moved
up from this value.
DLF
The bottom value of RSI coincident with LOW value of RSI once mometum
set in this counter.(Of course this is not LOD ).Peak of RSI is definitely
coincidented with Peak price or HOD.
As outcome of the poll reflects,the tool , RSI ,roughly catches the PEAKS
and TROUGHS.