Big Bank tends to be Bullish because of Indonesia's economic structure.
So when Big Bank was kept rising, it didn't show the problem that already boiled (in 2019).
I watch Other Big Caps to better gauge Composite's movement which consists of more Index Sectoral that just Banking Sector.
Other Big Caps already showed Downtrend since early 2019 where Bank just keep rising that made Composite relatively (and manipulative-ly) Sideways.