Sharp Decline
As expected, Subwave iv (red) has plunged sharply. Although I have labelled Subwave iv, it does not mean that it has ended. The typical retracement of Subwave iv is 38.2% (a Fibonacci ratio) of Subwave iii, as shown in the chart. It appears that Subwave iv will go down a bit more to about 3366, before Subwave v starts, going up.
Subwave v should go above the top of Subwave iii, so you may try to harness a small profit riding up Subwave v. But be ready to take profit when Subwave v tops, because the STI will drop after that.