In the weekly chart, I think it`s running a wave C, maybe reaches to the last lower position which is at 14500 in wave 2.
Another opinion is: P1 to P2 (21000 to 17000)= P3 to P4 (20000 to 16000)= 4000 points, so the first support will be 16000.
And if P2 to P3 (17000 to 20000)= P4 to P5(16000 to 19000)= 3000 points, then should have a rebound.
Another opinion is: P1 to P2 (21000 to 17000)= P3 to P4 (20000 to 16000)= 4000 points, so the first support will be 16000.
And if P2 to P3 (17000 to 20000)= P4 to P5(16000 to 19000)= 3000 points, then should have a rebound.